Battle of Bailén
|Battle of Bailén|
|Part of the Peninsular War|
The Surrender at Bailén by José Casado del Alisal. Oil on canvas. Museo del Prado.
|French Empire||Kingdom of Spain|
|Commanders and leaders|
|Pierre Dupont (POW)|| Francisco Castaños
Theodor von Reding
|27,110 regulars and militia
|Casualties and losses|
The Battle of Bailén was contested in 1808 between the Spanish Army of Andalusia, led by Generals Francisco Castaños and Theodor von Reding, and the Imperial French Army's II corps d'observation de la Gironde under General Pierre Dupont de l'Étang. The heaviest fighting took place near Bailén (sometimes anglicized Baylen), a village by the Guadalquivir river in the Jaén province of southern Spain.
In June 1808, in the midst of widespread uprisings against the French occupation of Spain, Napoleon assembled a number of flying columns to pacify Spain's major centres of resistance. One of these, under General Dupont, was dispatched across the Sierra Morena and south through Andalusia to the port of Cádiz, where a French naval squadron lay at the mercy of the Spanish uprising. The Emperor was confident that with 20,000 men, Dupont would crush any opposition encountered on the way; events proved otherwise, and after storming and plundering Córdoba in July, Dupont retraced his steps to the north of the province to await reinforcements. Meanwhile, General Castaños, commanding the Spanish field army at San Roque, and General von Reding, Governor of Málaga, travelled to Seville to negotiate with the Seville Junta—a patriotic assembly committed to resisting the French incursions—and to turn the province's combined forces against the French.
Dupont's failure to leave Andalusia proved disastrous. Between 16 and 19 July, Spanish forces converged on the French positions stretched out along villages on the Guadalquivir and attacked at several points, forcing the confused French defenders to shift their divisions this way and that. With Castaños pinning Dupont downstream at Andújar, Reding successfully forced the river at Mengibar and seized Bailén, interposing himself between the two wings of the French army. Caught between Castaños and Reding, Dupont attempted vainly to break through the Spanish line at Bailén in three bloody and desperate charges, losing more than 2,500 men.
His counterattacks defeated, Dupont called for an armistice and was compelled to sign the Convention of Andújar which stipulated the surrender of almost 18,000 men, making Bailén the worst disaster and capitulation of the Peninsular War, and the first major defeat of Napoleon's Grande Armée. When news of the catastrophe reached the French high command in Madrid, the result was a general retreat to the Ebro, abandoning much of central Spain to the insurgents. France's enemies in Spain and throughout Europe cheered at this first check to the hitherto unbeatable Imperial armies—tales of Spanish heroism inspired Austria and showed the force of nation-wide resistance to Napoleon, setting in motion the rise of the Fifth Coalition against France.
Between 1807 and 1808, thousands of French troops marched into Spain to support a Spanish invasion of Portugal orchestrated by Napoleon, who used the opportunity to initiate intrigues against the Spanish royal family. A coup d'état, instigated by Spanish aristocrats with French support, forced Charles IV from his throne in favour of his son Ferdinand, and in April, Napoleon removed both royals to Bayonne to secure their abdication and he replaced the Spanish Bourbon line with a Bonapartist dynasty headed by his brother Joseph Bonaparte.
However, none of these politicies sat well with the Spanish masses, who declared their loyalty to the deposed Ferdinand and revolted at the prospect of a foreign ruler. An uprising by the citizens of Madrid broke out on May 2, slew 150 French soldiers, and was violently stamped out by Marshal Murat's elite Guards and mameluk cavalry. Joseph's entry into his prospective kingdom was delayed as guerrillas poured down from the mountains and seized or threatened the main roads.
On 26 May, Joseph Bonaparte, in absentia, was proclaimed King of Spain and the Indies in Madrid, his envoys receiving the acclamations of the Spanish notables. The madrileños, however, were indignant; Spanish soldiers quietly withdrew to insurgent-held villages and outposts outside the city, and only Murat's 20,000 bayonets kept the city in order.
Outside the capital, the French strategic situation deteriorated rapidly. The bulk of the French army, 80,000 strong, could hold only a narrow strip of central Spain stretching from Pamplona and San Sebastián in the north through to Madrid and Toledo to the south. Murat, stricken in an outbreak of rheumatic colic which swept the French camp, quit his command and returned to France for treatment: "the Spanish priests would have rejoiced if the hand of God had been laid on him whom they called the butcher of the 2nd of May." General Savary, a man "more distinguished as Minister of Police than as any field commander", arrived to take command of the shaky French garrison at a critical hour.
With much of Spain in open revolt, Napoleon established a headquarters at Bayonne on the Spanish frontier to oversee the redress of his beleaguered forces. The Emperor assembled a number of flying columns to seize and pacify Spain's major cities: Marshal Bessières pushed northwest into Old Castile with 25,000 men and sent a detachment east into Aragón, aiming to capture Santander with one hand and Zaragoza with the other; General Moncey marched toward Valencia with 29,350 men; and General Duhesme marshalled 12,710 troops in Catalonia and put Gerona under siege. Finally, General Dupont led 13,000 men south toward Seville and ultimately the port of Cádiz, which sheltered Admiral François Rosilly's fleet from the Royal Navy.
War reaches Andalusia 
Dupont's corps primarily fielded of second-line forces of a distinctly unimpressive character. These second-line troops, originally raised as provisional or reserve formations, had been intended either for internal police services or garrison duty in Prussia—evidence that Napoleon intended the Spanish campaign to be "a mere promenade." This force approached Córdoba in early June and captured the Alcolea bridge, sweeping past Spanish militia under Colonel Don Pedro de Echávarri that attempted to block their progress. The French entered Córdoba June 7 and ransacked the town for four days. However, in the face of increasingly menacing mass uprisings across Andalusia, Dupont decided to withdraw to the Sierra Morena, counting on help from Madrid.
The French retreated fitfully in the sweltering heat, burdened with some 500 wagons of loot and 1,200 ill. A French surgeon remarked: "Our little army carried enough baggage for 150,000 men. Mere captains required wagons drawn by four mules. We counted more than 50 chariots per battalion, the result of the plunder of Córdoba. All our movements were impeded. We owed our defeat to the greed of our generals." General Gobert's division set out from Madrid on July 2 to add weight to Dupont's expedition. However, only one brigade of his division ultimately reached Dupont, the rest being needed to hold the road north against the guerrillas.
Reinforcements across the Sierra 
Napoleon and the French strategists, anxious about their communications with Bayonne and wary of a British descent upon a Biscayan coast already in open revolt, initially prioritized operations in the north of Spain. In mid-June General Lasalle's victory at Cabezón simplified matters tremendously; with the Spanish militias around Valladolid destroyed and much of Old Castile overrun, Savary shifted his gaze south and resolved to reopen communications with Dupont in Andalusia. Apart from the menace in the north, Napoleon was most anxious to secure the Andalusian provinces, where the traditional, rural peasantry was expected to resist Joseph's rule. On June 19 General Vedel with the 2nd Division was dispatched south from Toledo to force a passage over the Sierra Morena, hold the mountains from the guerrillas, and link up with Dupont, pacifying Castile-La Mancha along the way.
Vedel set out with 6,000 men, 700 horse, and 12 guns, joined during the march by small detachments under Generals Roize and Ligier-Belair. The column raced across the plains, encountering no resistance, although stragglers were seized and cut down by the locals. Reaching the sierra on June 26, the column found a detachment of Spanish regulars, smugglers, and guerrillas with six guns under Lieutenant-Colonel Valdecaños blocking the Puerta del Rey. Vedel's troops stormed the ridge and overran the enemy cannon, losing 17 dead or wounded. They then pushed south over the mountains toward La Carolina. The next day they encountered a detachment of Dupont's troops preparing to attack these same passes from the south side. With this junction, communications between Dupont and Madrid were reestablished after a month of silence.
Confused orders 
Vedel carried new orders from Madrid and Bayonne: Dupont was instructed to stop his march on Cádiz and fall back north-eastwards on the mountains (a fait accompli), watching the Spanish movements in Andalusia while awaiting the reinforcements to be released upon the capitulation of Zaragoza and Valencia. These capitulations never came. For a time Marshal Moncey was simply nowhere to be found; at length his defeat at the gates of Valencia surfaced; some 17,000 Spaniards under the Conde de Cervellón massed victoriously around that city as Moncey gave up in disgust, having lost 1,000 men in a vain attempt to storm the walls. Suddenly, all prospects evaporated of Moncey's corps pivoting west from Valencia toward Granada and coupling with Dupont in a two-pronged invasion of Andalusia. Nor were troops forthcoming from Aragon, as Zaragoza shook off repeated French assaults and vowed to fight to the death. Meanwhile, Savary set to work preparing for the arrival of Joseph in his new capital. Many of the scattered French formations were drawn back around Madrid for security; Dupont would remain close at hand to succour the capital if Bessières' campaign in the north took a turn for the worse and Spanish armies appeared on the horizon.
Yet at no time was Dupont's Andalusian expedition altogether scrapped. Savary continued to issue vague orders promising reinforcements at an undisclosed date while Napoleon fumed at the prospect of abandoning even Andújar to the Spaniards. With events hanging in the air, Dupont chose to hold his ground along the Guadalquivir, sacking and occupying the town of Bailén and the provincial capital of Jaén, instead of completing his retrograde movement to the strong positions atop the sierra's defiles. Napoleon wrote lightly, "even if he suffers a setback, ...he will just have to come back over the Sierra."
Spain prepares 
Upon learning of the French incursion into the southern provinces, General Castaños, guessing Dupont's intention, prepared to entrench his army in a fortified camp across from the strongpoint of Cádiz; Dupont's retrograde movement rendered these precautions unnecessary. Setting up a General Headquarters in Utrera, Castaños set about organizing the Army of Andalusia into four divisions under General von Reding, the Marquis de Coupigny (whose staff included a young San Martín, then a captain in the Spanish Army), Félix Jones, and a fourth (nominally in reserve) under Manuel la Peña. Colonel Juan de la Cruz Mourgeón led an additional column of some 1,000 skirmishers, armed peasants, and other light infantry.
Stalled on the Guadalquivir 
While Dupont lingered at Andújar with two divisions (Generals Barbou and Fresia), attempting to master the strategic Madrid—Seville highway and the wide plains which it crossed, Castaños' four divisions advanced steadily from the south and guerrillas from Granada marched to bar the road to the sierra and La Mancha beyond. Vedel's division was posted east to Bailén with a view to guarding these nearby mountain passes and on July 1 Vedel was forced to dispatch a brigade under General Cassagne to curb the advance of the guerrillas on Jaén and La Carolina, stretching the French line still further east. Meanwhile, General Liger-Belair with 1,500 men moved into a forward post at Mengibar, a village on the south bank of the Guadalquivir. At Andújar a tower by the river was fortified and small field works constructed on the south bank to forestall an enemy crossing, but, the Guadalquivir being fordable at so many points, and open to fire from the surrounding hills, Dupont's defences did not inspire much confidence. Cassagne, after driving the guerrillas off in rout, returned to Bailén on July 5 with 200 dead or wounded and nothing to show for his exertion—the Spaniards having plundered the towns of all provisions.
Glimmers of the long-promised reinforcements appeared at last: Generals Gobert and Lefranc passed the Puerta del Rey July 15, leaving behind a strong garrison in the Morena, and descended into Andalusia with their remaining infantry and cuirassiers. Dupont now had over 20,000 men idling along the Guadalquivir while the Spaniards massed and approached. But supplies were scarce and the Spanish peasants had deserted their fields, obliging Dupont's wearied men to bring in the harvest, grind the grain, and bake their own rations; 600 men fell ill during their fortnight's stay by drinking the putrid waters of the Guadalquivir. According to French testimony, "The situation was terrible. Every night, we heard armed peasants roaming around us, drawn to our goods, and every night, we expected to be assassinated."
Early fighting 
On July 9 General La Peña's division took up a position extending from El Carpio to Porcuna and the Army of Andalusia began a number of demonstrations against the French. From west to east along the Guadalquivir, Castaños with 14,000 men in two divisions (La Peña and Jones) approached Dupont at Andujar, Coupigny advanced his division to Villa Nueva, and Reding prepared to force a passage at Mengibar and swing north to Bailén, outflanking the French and cutting Dupont's line of retreat to the mountains. Marching east to Jaén, Reding delivered a strong attack against the French right wing between July 2 and July 3, sending the 3rd Swiss regiment into the teeth of Cassagne's brigade. The Spaniards were forced back (losing 1,500 casualties according to General Foy), but the isolated French brigade felt its danger and on the 4th Cassagne fell back over the Guadalquivir to Bailén, leaving only a few companies to guard the ferry at Mengibar.
Reding assaulted Mengibar anew on July 13 and drove Ligier-Belair from the village after a hard fight; at the appearance of Vedel's division, however, the Spanish column quietly drew back and French infantry reclaimed the town. The next day Coupigny tested the grounds at Villa Nueva and engaged the French piquets opposite him in a sharp skirmish. Castaños reached the heights at Arjonilla on July 15 and, setting up a battery on a ridge overlooking Andújar, opened fire on Dupont. At the same time, 1,600–4,000 skirmishers and irregulars under Colonel De la Cruz forded the river near Marmolejo and attacked towards Dupont's rear, but were handily repulsed by a French battalion and dispersed into the hills. Alarmed by this show of force, Dupont called on Vedel to release a battalion or even a brigade to his assistance, and Vedel, judging that Mengibar was not seriously threatened, set out in the night with his entire division. The arrival of Vedel with this sizeable force put an end to the threat at Andújar but gravely imperilled the French right wing (Mengibar—Bailén—La Carolina), leaving Ligier-Belair seriously denuded of troops in his fight against Reding.
On July 16, Dupont and Vedel, expecting a desperate struggle for Andújar, found Castaños and Coupigny merely repeating the previous day's noisy demonstrations without seriously attempting a passage. Reding, however, was on the move: making a feint toward the Mengibar ferry with his sharpshooters, the Swiss forded the river upstream at Rincon and, encircling Mengibar, crushed the French battalions under Ligier-Belair. General Gobert, rushing forth from Bailén to plug the gap, was shot in the head and later died of the wound, and his counterattack, carried on by Brigadier-General Dufour, collapsed under the weight of the Spaniards. Distracting Reding with repeated charges from his cuirassiers, Dufour disengaged his men and fell back onto Bailén.
Alerted to the loss of Mengibar, Dupont hesitated once again. Unwilling to take advantage of Vedel's presence to engage in a trial of strength with Castaños—a successful attack on the Arjonilla might have turned the Spanish line in return and allowed Dupont to swing across the rear of Coupigny and Reding—Dupont hunkered down at Andújar and ordered Vedel's weary division back to Bailén to prevent the collapse of the right wing.
The right wings disengage 
The fighting around Mengibar then took a curious turn: Reding, having finally gained the north bank and turned the French flank, suddenly retreated to the other side of the river, perhaps feeling isolated with his lone division. At the same time, guerrillas under Colonel Valdecanos made an unwelcome appearance on Dufour's flank, scattering his outposts and menacing the road to the Puerta del Rey. Dufour, conscious of the danger to the mountain passes, set off to confront the Spanish flankers at Guarromán and La Carolina. Consequently, when Vedel, by another tiring night march, retraced his steps to Bailén, he found the position oddly deserted of both friend and foe.
When his reconnaissance parties made no contact with the enemy at the Guadalquivir, Vedel concluded that Reding had shifted his division to another point along the line. Dufour sent back alarming reports from Guarromán, convincing Vedel that 10,000 Spaniards—perhaps Reding's division, he warned—were marching on the mountains to their rear. This was too much. Gathering his exhausted division, Vedel hurried to Dufour's aid on July 17, arriving at Santa Carolina the next day. Dufour's fatal blunder was soon revealed. Vedel discovered that the small band of irregulars roaming about were not at all the threat Dufour had described; for the third time the Spaniards had stolen a march from him, and Reding still hovered somewhere around Mengibar, out of sight. Worse yet, an enormous gap now existed between Dupont and Vedel, and not a single battalion remained to prevent Reding from seizing the central position at Bailén.
News of Vedel's ill-advised movements reached Dupont at noon on July 18 and convinced him to fall back on Bailén and to recall Vedel there as well, re-concentrating his now dangerously scattered army: "I do not care to occupy Andujar. That post is of no consequence." With a wary eye on Castaños' columns across the river, and needing time to prepare his wagons and carriages (encumbered by plunder from the sack of Cordoba), Dupont postponed the retreat till nightfall, hoping to conceal his departure from the Spaniards. Meanwhile, Reding, calling up Coupigny's division from Villa Nueva, had crossed at Mengibar on July 17 and seized the deserted Bailén, bivouacing there the night and preparing to swing west towards Dupont's—and what he assumed to be Vedel's (oblivious as he was to the latter's recent movement east)—position in the morning.
Vedel quit La Carolina at 5:00 a.m. July 18 and rushed the bone-weary French right wing south-west toward Bailén, unwittingly bearing down on Reding's rear. Both armies were now north of the Guadalquivir and staggered in a curious position: Dupont between Castaños and Reding; Reding between Dupont and Vedel. At Guarromán, scarcely two leagues from Bailén, Vedel rested his footsore troops for a few hours—"he could not refuse this", says General Foy, "after three days and three nights of incessant marching"—while patrols raced west to Linares to secure his rear. Aware neither that Dupont was preparing to move in his direction, nor that Vedel was now in fact drawing in behind him, Reding, posting a few battalions to hold Bailén from whatever French formations might remain in the east, set off with his two divisions westwards July 18, intending to surround Andújar from the rear and smash Dupont against Castaños.
Dupont slipped away from Andújar unobserved and at dawn July 19, his vanguard under Brigadier Chabert made contact with Reding's leading elements (veterans of the Walloon Guard) just shy of Bailén. Though caught off guard, Reding reacted "with promptitude and skill," dissolving his columns and drawing up a defensive line with 20 guns in an olive grove intersected with deep ravines, about two miles from Dupont's main body. Badly underestimating the force before him, Chabert charged his 3,000 men into Reding's two divisions and was enfiladed and repulsed with heavy losses. Dupont, following with the main body of the convoy at two leagues' distance, halted the bloodied vanguard, posted General Barbou to defend the rear against any pursuit by Castaños, and ordered all other formations to the fore in an attempt to crack Reding's line.
Expecting to be overtaken and crushed by Castaños' columns at any moment—one division under La Peña had already crossed to Andújar in pursuit and approached steadily—Dupont committed his troops piecemeal, without massing a reserve. As one historian observes, his troops were "both exhausted and strung out, and to commit them to battle in dribs and drabs was foolhardy in the extreme." Brigadiers Chabert and Dupré led an infantry brigade and the chasseurs against the left wing, held by the Walloon Guards, but no ground was gained and Dupré fell mortally wounded at the head of his troops. Dupont's scattered guns were laboriously formed into batteries to support the attack only to be knocked out by the heavier Spanish artillery once the firing began. On the right, opposite Reding's militias and Swiss regulars, a fierce and desperate attack bent back the Spanish line. The cuirassiers trampled an enemy infantry regiment, reached the artillery and sabred the gunners, but the Spaniards, extending their line and maintaining a constant fire, compelled the French to abandon the captured guns and fall back.
Fresh troops came up at 10:00 a.m. and Dupont immediately launched a second attack, with General Pannetier's brigade leading the charge. One last formation joined them; d'Augier's marines of the Imperial Guard, in theory the best troops present: "They were only three hundred men", Foy remarks, "but they were three hundred whom no fears could ever make falter." Dupont, himself wounded in the hip, grouped his exhausted and worn-out regiments around the Guard battalion in a last effort to break through to Bailén. At this point reserves may have pierced the badly shaken Spanish line: Dupont had none; and the French columns, mercilessly raked by the Spanish artillery, were forced back down the slope for the third time. Dupont's Swiss regiments, originally in Spanish service, defected, arms and baggage, to their former masters; and lastly, Castaños' force finally arrived, overtaking Barbou along the Rumblar (a small tributary flowing from the Morena into the Guadalquivir), with La Peña's division sounding its guns and preparing to storm the French rearguard. The day was lost.
Closing moves 
An unexpected Spanish reinforcement appeared suddenly in the last minutes of the battle, slipping south out of the foothills along the Rumblar and taking up positions among the rocks on the French left flank: Colonel de la Cruz. Driven off into the mountains in the attack of July 16, de la Cruz had regrouped 2,000 sharpshooters at Peñas del Moral and climbed back down towards the battle, directed by the sound of firing. Dupont was now hopelessly surrounded on three sides.
Towards noon, as Dupont's guns went quiet, Vedel continued from Guarromán onto Bailén and observed napping troops which he assumed to be Dupont's vanguard returning from Andújar—in fact they were Reding's Spaniards. Vedel and Reding prepared for battle, the latter pulling up Legrange's cuirassiers, Cassagne's legion, and Dufour's brigade for the attack. On the Spanish side, Reding deployed Coupigny's division to meet the threat, with an Irish battalion and two guns on a knoll leading up to the mountains; a regiment of regular troops, the Órdenes militares, at the San Cristóbal monastery; militia in support; and the other battalions drawn up behind, in the centre. Two Spanish officers approached Vedel under a flag of truce, announcing that Dupont had been badly defeated and had proposed to suspend arms; the Frenchman replied, "Tell your General, that I care nothing about that, and that I am going to attack him."
Vedel directed Cassagne's legion, supported by Boussard's dragoons, against the Irish position on the knoll. While Cassagne grappled the Irish, Boussard raced around the enemy flank and rear, trampled part of Coussigny's militia regiment, and enveloped the knoll. Their guns lost, the Irish battalion surrendered, and Vedel's men took the knoll and 1,500 prisoners. Meanwhile, Colonel Roche's column struck the Spanish strongpoint at San Cristóbal, possession of which was necessary if Vedel hoped to turn Coupigny and force open a path to Dupont. But here the Spanish regulars under Colonel Francisco Soler held their line obstinately and all attacks failed.
Upon Castaños' arrival Dupont decided to call for a truce, negotiating terms with the Spanish officers over several days. After learning this, Vedel withdrew some distance along the highway. Spanish commanders threatened to massacre the French soldiers if this formation did not surrender, and Dupont compelled Vedel to return and lay down his arms. Handing his sword to Castaños, Dupont exclaimed, "You may well, General, be proud of this day; it is remarkable because I have never lost a pitched battle until now—I who have been in more than twenty." The Spaniard's biting reply: "It is the more remarkable because I was never in one before in my life."
Neither the fruit of brilliant strategic planning, nor the war's largest or bloodiest battle, Bailén nonetheless assumed mythical status in Spain, its symbolism rapidly eclipsing the reality—the negotiated surrender of a rather inexperienced French corps in a peripheral theatre. At a decisive moment, news of victory rallied much of the vacillating Spanish elite to the insurrectionary movements surging across the country: Suddenly, the expulsion of the French by arms seemed possible, if not inevitable. At the same time, Spanish victory in an obscure Andalusian village signalled to the armies of Europe that the French, long considered invincible, could be beaten—a fact that persuaded the Austrian Empire to initiate the War of the Fifth Coalition against Napoleon:
This was an historic occasion; news of it spread like wildfire throughout Spain and then all Europe. It was the first time since 1801 that a sizable French force had laid down its arms, and the legend of French invincibility underwent a severe shaking. Everywhere anti-French elements drew fresh inspiration from the tidings. The Pope published an open denunciation of Napoleon; Prussian patriots were heartened; and, most significantly of all, the Austrian war party began to secure the support of the Emperor Francis for a renewed challenge to the French Empire.
To commemorate a victory so rich in symbolic and propaganda value, the Seville Junta instituted the Medalla de Bailén. The British press avidly publicized the event and printed Castaños' victory statements across Europe:
This army, so superior to ours, has not only been beaten and routed, but has been constrained to lay down its arms, and give up its artillery, and has suffered the lowest military degradation, which the French have been hitherto accustomed to impose upon all the other nations of Europe; and the Imperial Eagles, the proud insignia of their triumph, have become the trophies of the Spanish Army of Andalusia on the fields of Baylen.
— XAVIER DE CASTANOS, Head Quarters, Andujar, July 27, 1808
|“||Has there ever, since the world began, been such stupid, cowardly, idiotic business as this?||”|
Dupont and Vedel returned to Paris in disgrace and were duly court-martialed, deprived of rank and title, and imprisoned at Fort de Joux for their role in the disaster. (Dupont was not paroled until the restoration of Louis XVIII; indeed, rumours persisted that he had been quietly assassinated in captivity.) None of the commanding officers, however slight their share of the responsibility, escaped without retribution: Napoleon held that his army in Spain had been "commanded by postal inspectors rather than generals." In January 1809, the Emperor halted a parade in Valladolid when he recognized Dupont's chief of staff among the commanders, scolding the unfortunate officer in full view of the troops and ordering him off the square. According to General Foy, Napoleon began his tirade: "What, general! did not your hand wither up when you signed that infamous capitulation?" Years later, Napoleon opened an inquiry into the Convention of Andujar under the mandate of the Imperial High Court, in camera, which turned out yet another proclamation against Dupont. An Imperial decree dated May 1, 1812, prohibited any field commander to treat for capitulation and declared every unauthorized surrender a criminal act punishable by death.
Apart from the blow to French prestige, Bailén threw the French invasion forces—faltering after their failure to secure Gerona, Zaragoza, Valencia, Barcelona, and Santander, and with the country rapidly arming and mobilizing against them—into panic and disarray. With the sudden loss of 20,000 troops, Napoleon's military machine abruptly fell apart. On Savary's advice, Joseph fled from the openly hostile capital; joining him on the highway were Bessières and Moncey, who drew the French corps north from Madrid and continued past Burgos in what became a wholesale retreat. The French did not halt until they were safely over the Ebro, where they could set up secure defensive positions along the north bank and wait out events. From his makeshift headquarters at Vitoria, Joseph wrote to his brother gloomily: "I repeat that we have not a single Spanish supporter. The whole nation is exasperated and determined to fight." Napoleon, furious and dismayed, remarked that to cross the Ebro was "tantamount to evacuating Spain."
Napoleon had considered the Spanish Bourbon regime's old, regular army, for all its proud traditions hearkening back to the glorious tercios, to be "the worst in Europe", while the new militia formations were dismissed as packs of "bandits led by monks." Castaños himself conceded that the greater part of his troops had been "raw and inexperienced; but they were Spaniards, and Spaniards are heroes." But it was this maligned army, largely untouched by French Revolutionary military principles—a relic from the previous century's absolutist administration—which outfought the Imperial citizen-soldiers. Spain's ancien regime military institutions, however, quickly unravelled in the following months, eclipsed by the growing scale of the war, crippled by the infusion of untrained conscripts, and caught up in the competing designs of the juntas.
In November, Napoleon directed the bulk of the Grande Armée across the Pyrenees and dealt a series of devastating blows to the vacillating Spanish forces, receiving the surrender of Madrid in scarcely a month's time. As Spain's military and political apparatus deteriorated dramatically, so did the quality of its armed forces, recruited and equipped in the chaos of French military occupation and counterinsurgency. Subsequent efforts to fashion field armies capable of reproducing a Bailén proved less successful: Castaños was himself routed by Marshal Lannes at Tudela in November 1808, while Reding was ridden down and trampled by the French cavalry at Valls in 1809, dying of his wounds. Marshal Soult overran much of Andalusia the following year and on January 21, 1810, his men recovered the lost Eagles from the cathedral of Bailén. Before long, only Cádiz remained firmly in Spanish hands, and a difficult war lay ahead to drive the invader from Spain. Throughout the war, attempts to meet the French in open fields with corps severely deficient in training, leadership, and equipment led to frequent defeat, as incompetent or politically appointed commanders felt pressured to recreate Bailén without the talent or the means. This "Bailén syndrome" haunted Spain for the duration of the war:
So brilliant was the victory and so simple the encircling manoeuvre, that Wellesley later on had great difficulty in getting 'Baylen' out of the Spaniards' system. He used to say jocularly before every engagement: "Now this is not Baylen—don't attempt to make it a battle of Baylen!"
Fate of the prisoners 
Dupont and his staff officers were transported on Royal Navy vessels to Rochefort harbour after the Seville Junta refused to honour the pact under which the French were to be repatriated via Cádiz. The French prisoners were kept in Cadiz harbor aboard prison hulks, old warships that had their masts and rigging removed. They were fed at irregular intervals on the overcrowded vessels. The start of the Siege of Cádiz in 1810 meant that French troops occupied the land approaches to the city. From 6 to 9 March 1810 a howling storm struck from the southwest and drove one Portuguese and three Spanish battleships ashore, where they were destroyed by French cannon fire. Thirty merchant ships were also sunk or driven ashore in the same tempest, including one vessel with 300 men of the British 4th Foot who became prisoners of war. The French officers, who were segregated aboard the Castilla, noted that vessels which had lost their anchors had drifted onto the opposite shore during the storm. During the next south-wester, on the night of 15 and 16 March, the officers overcame their Spanish guards and cut the prison hulk's cables. The French fought off the crews of two gunboats that tried to retake the vessel and over 600 escaped when the Castilla grounded on the French side of the bay. Ten days afterward, the prisoners on the Argonauta tried the same thing, but suffered a worse fate. The ship stuck fast on a bar out in the harbor and was taken under fire by several gunboats. At length the ship caught fire and fewer than half of the prisoners survived to be rescued by their compatriots. Several British sailors later expressed their revulsion at having to shoot at escaping prisoners.
The few remaining officers were transferred first to Majorca and later to England. The rank and file were sent to the Canary and Balearic Islands, where the inhabitants protested at the proximity of so many of their enemies. Consequently, 7,000 prisoners were put on the uninhabited island of Cabrera. The Spanish government, which could barely supply its own armies in the field, was unable to properly take care of the prisoners. Cannibalism was alleged to have occurred during times when the supply ships failed to arrive. On 6 July 1814, the remaining survivors of Bailén returned to France: fewer than half remained, most having perished in captivity. Many of the survivors never recovered their health after the experience.
- Gates, Appendix 2, p. 481
- Napier, p. 73
- Gates, p. 55
- Napier, p. 71 and Foy, p. 346 give 2,000 French casualties. These figures refer to Dupont's July 19 action against Reding; total losses over the four days' battle were much higher. Napier, p. 73, estimates 5,000 French dead or wounded across the field.
- "Spain. Official Account of the Battle of Baylen", The Times. September 23, 1808, p. 3
- Glover, p. 54: "17,635 unwounded men became prisoners of the Spaniards. It was the worst disaster suffered by the French army since the turn of the century."
- Chandler, p. 616
- Esdaile (2003), p. 62 notes, "Spain was overjoyed, Britain exultant, France dismayed, and Napoleon outraged. It was the greatest defeat the Napoleonic empire had ever suffered, and, what is more, one inflicted by an opponent for whom the emperor had affected nothing but scorn."
- Glover, p. 53
- Chandler, p. 610
- Foy, p. 311
- Chandler, p. 612
- Foy, p. 312
- Glover, p. 54
- Chandler, p. 611; Gates, pp. 181–182
- Gates, p. 51
- Esdaile 2003, p. 63.
- Esdaile 2003, p. 64.
- "Récit du Docteur Treille" in Larchey, p. 1: Notre petite armée avait plus de bagages qu'une armée de 150,000 hommes. De simples capitaines et des civils assimilés à ce grade avaient des carrosses à quatre mules. On comptait au moins cinquante chariots par bataillon ; c'étaient les dépouilles de la ville de Cordova. Nos mouvements en étaient gênés. Nous dûmes notre perte à la cupidité des chefs.
- Foy, p. 327
- Chandler, p. 615
- Foy, p. 315
- Foy, p. 316
- Napier, p. 69, assigns a strength of 3,000 men to the Spaniards, but claims their colonel defected to Vedel.
- Foy, p. 317
- Foy, p. 318
- Chandler, p. 614
- Esdaile (2003), p. 68
- Esdaile (2003), pp. 67-68, 75-76
- Foy, p. 337
- Conde de Toreno, p. 103
- Conde de Toreno, p. 103
- Hamilton, p. 160
- Foy, p. 331
- Foy, p. 342
- Napier, p. 69
- Gates, p. 52
- Foy, p. 325–326
- Larchey, p. 4: La situation était terrible. Chaque nuit, nous entendions les paysans armés rôder autour de nous, alléchés qu'ils étaient par l'espoir du butin, et chaque nuit, nous nous attendions à être assassinés.
- Napier, p. 70, gives the date as July 1
- Hamilton, p. 162
- Foy, p. 326
- Foy, p. 334
- Hamilton, p. 163; Napier, p. 71
- Gates, p. 53
- Foy, p. 335
- Foy, p. 338
- Foy, p. 339
- Foy, p. 340
- Gates, p. 54
- Napier, p. 71
- Foy, p. 349
- Hamilton, p. 166
- Hamilton, p. 165
- Foy, p. 344
- Hamilton, p. 167 and Foy, p. 344
- Foy, p. 345
- Foy, p. 346
- Gates, p. 54 and Foy, p. 346
- Hamilton, p. 168; Foy, p. 347
- Foy, p. 347
- Foy, p. 350
- Foy, p. 351
- Napier, p. 72
- Esdaile (2003), p. 83
- Cayuela Fernández (2008), p. 118
- Chandler, p. 617
- Chandler, p. 618
- Chandler, p. 618; Glover, p. 54
- Glover, p. 55
- Foy, p. 366
- Foy, p. 368
- Chandler, p. 619
- Esdaile (2003), p. 489, notes: "Not only had many officers perished in the uprising of May 1808, but the authority of the army had been severely reduced and the autonomy of the military estate invaded in an unprecedented manner. Following the uprising, meanwhile, new officers and old had found themselves waging a desperate war against a powerful aggressor in the most unfavourable circumstances. Hostile to military discipline, the troops had been prone to riot and desertion just as the populace had done all it could to resist the draft. Meanwhile, unscrupulous and irresponsible propagandists had created false expectations of victory, whilst equally unscrupulous and irresponsible politicians had interfered in the conduct of military operations, failed to supply the army with the sinews of war, fomented alternative structures of military organisation that hindered the war effort as much as they assisted it, and made general after general scapegoats for disasters which were often none of their making."
- Esdaile (2003), p. 66, describes the severe deficiencies of the ad hoc military units raised in Spain for the campaigns of 1808–1809: "The raw levies that formed the bulk of the Spanish forces proved incapable of manoeuvring in the face of the enemy, whilst many of them barely knew how to use their weapons, having sometimes only been issued with muskets the day before they went into action." These untrained recruits typically broke ranks when assaulted by the French regulars, "accusing their commanders of treason and leaving the few [Spanish] regulars involved to fend for themselves as best they could. Having run away, meanwhile, the levies invariably exposed themselves to the French cavalry, which were unleashed amongst them with terrible effect, sabring them unmercifully and taking hundreds of them prisoner."
- Glover, p. 118
- Longford, p. 190
- Oman (1996), III, pp. 321-322
- Oman (1996), III, pp. 322-323
- Gates, p. 56
- Cayuela Fernández, José Gregorio (2008). La Guerra de la Independencia: Historia Bélica, Pueblo y Nación en España, 1808-1814. Universidad de Salamanca. ISBN 978-84-7800-334-1.
- Chandler, David G. (1994). The Campaigns of Napoleon. Weidenfeld & Nicolson. ISBN 0-297-81367-6.
- Foy, Maximilien Sébastien (1827). History of the war in the Peninsula under Napoleon II. S. and R. Bentley.
- Esdaile, Charles J. (2003). The Peninsular War: A New History. Macmillan. ISBN 978-1-4039-6231-7.
- Gates, David (1986). The Spanish Ulcer: A History of the Peninsular War. W W Norton & Co. ISBN 0-393-02281-1.
- Glover, Michael (1974). The Peninsular War 1807–1814: A Concise Military History. Penguin Classic Military History (published 2001). ISBN 0-14-139041-7.
- Hamilton, Thomas (1829). Annals of the Peninsular Campaigns: From MDCCCVIII to MDCCCXIV. W. Blackwood.
- Larchey, Lorédan (1884). Les suites d'une capitulation: relations des captifs de Baylen et de la glorieuse retraite du 116e régiment. Imp. Th. Lombaerts.
- Longford, Elizabeth (1969). Wellington: The Years of The Sword. Panther. ISBN 978-0-586-03548-1.
- Lorblanchès, Jean-Claude (2007). Les soldats de Napoléon en Espagne et au Portugal, 1807-1814. Editions L'Harmattan. ISBN 978-2-296-02477-9.
- Napier, William (1831). History of the War in the Peninsula I. Frederic Warne and Co.
- Oman, Charles (1996). A History of the Peninsular War Volume III. Mechanicsburg, Pennsylvania: Stackpole. ISBN 1-85367-223-8.
- Conde de Toreno (1836). Historia del levantamiento, guerra y revolución de España I. M. Rivadeneyra (published 1872).
Further reading 
- Bueno, José María Uniformes españoles de la Guerra de Independencia Aldaba, 1989, ISBN 84-86629-20-9.
- Esdaile, Charles J. The Spanish Army in the Peninsular War Manchester University Press, 1988, ISBN 0-7190-2538-9.
- Oman, Sir Charles A History of the Peninsular War: 1807-09: From the Treaty of Fontainebleau to the Battle of Corunna Greenhill Books, 1995, ISBN 1-85367-214-9.
- Partridge, Richard Battle Studies in the Peninsula May 1808 - January 1809 Constable and Robinson, 1998, ISBN 0-09-477620-2.
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