The Chauci (German: Chauken, and identical or similar in other regional modern languages) were an ancient Germanic tribe living in the low-lying region between the Rivers Ems and Elbe, on both sides of the Weser and ranging as far inland as the upper Weser. Along the coast they lived on artificial hills called terpen, built high enough to remain dry during the highest tide. A dense population of Chauci lived further inland, and they are presumed to have lived in a manner similar to the lives of the other Germanic peoples of the region.
Their ultimate origins are not well understood. In the Germanic pre-Migration Period (i.e., before c. 300 AD) the Chauci and the related Frisians, Saxons, and Angles inhabited the Continental European coast from the Zuyder Zee to south Jutland. All of these peoples shared a common material culture, and so cannot be defined archaeologically. The Chauci originally centered on the Weser and Elbe, but in c. AD 58 they expanded westward to the River Ems by expelling the neighboring Ampsivarii, whereby they gained a border with the Frisians to the west. The Romans referred to the Chauci living between the Weser and Elbe as the 'Greater Chauci' and those living between the Ems and Weser as the 'Lesser Chauci'.
The Chauci entered the historical record in descriptions of them by classical Roman sources late in the 1st century BC in the context of Roman military campaigns and sea raiding. For the next 200 years the Chauci provided Roman auxiliaries through treaty obligations, but they also appear in their own right in concert with other Germanic tribes, opposing the Romans. Accounts of wars therefore mention the Chauci on both sides of the conflict, though the actions of troops under treaty obligation were separate from the policies of the tribe.
The Chauci lost their separate identity in the 3rd century when they merged with the Saxons, after which time they were considered to be Saxons. The circumstances of the merger are an unsettled issue of scholarly research.
 Society and Life
The Germans of the region were not strongly hierarchical. This had been noted by Tacitus, for example when he mentioned the names of two kings of the 1st century Frisians and added that they were kings "as far as the Germans are under kings". Haywood (Dark Age Naval Power, 1999) says the Chauci were originally neither highly centralised nor highly stratified, though they became more so after 100 AD. Yorke (The Conversion of Britain c.600–800, 2006), speaking of the 5th century, describes the 'Continental Saxons' (which then included the Chauci) as having powerful local families and a dominant military leader.
Writing in AD 79, Pliny the Elder said that the Germanic tribes were members of separate groups of people, suggesting a distinction among them. He said that the Chauci, Cimbri and Teutoni—the people from the River Ems through Jutland and for some distance inland—were members of a group called Ingaevones (a "Cimbri" people were also given as members of a different group, and this is likely a different people).
Tacitus, writing in AD 98, described the inland, non-coastal Chauci homeland as immense, densely populated, and well-stocked with horses. He was effusive in his praise of their character as a people, saying that they were the noblest of the Germans, preferring justice to violence, being neither aggressive nor predatory, but militarily capable and always prepared for war if the need arose.
Pliny (AD 23–79) had visited the coastal region and described the Chauci who lived there. He said that they were "wretched natives" living on a barren coast in small cottages (or huts) on hilltops, or on mounds of turf built high enough to stay dry during the highest tide (i.e., terpen). They fished for food, and unlike their neighbors (i.e., those living inland, away from the coast) they had no cattle, and had nothing to drink except rainwater caught in ditches. They used a type of dried mud (i.e., "surface peat") as fuel for cooking and heating. He also mentioned their spirit of independence, saying that even though they had nothing of value, they would deeply resent any attempt to conquer them.
 Classical Roman history
The record is incomplete. The bulk of historical information about the Chauci is from the Annals of Tacitus, written in 117. Many parts of his works have not survived, including an entire section covering the years AD 38–46, as well as the years after AD 69.
The earliest mention of the Chauci is from 12 BC and suggests that they were assisting other Germanic tribes in a war against the Romans. Drusus campaigned against those Germans along the lower Rhine, and after devastating the lands west and north of the Rhine he won over (or defeated or intimidated) the Frisians. He was in the process of attacking the Chauci when his vessels were trapped by an ebb tide. Drusus gave up the attack and withdrew.
 Aftermath of Teutoburg Forest, c. 15
The Germans under Arminius had destroyed 3 Roman legions under Varus at the Battle of the Teutoburg Forest in AD 9. The Romans recoiled at first but then Germanicus initiated destructive campaigns against those Germans whom the Romans blamed for their defeat. The Chauci were not among them, and were said to have promised aid, and were associated with the Romans in "military fellowship". However, in defeating Arminius' own tribe (the Cherusci) the Romans were unable to capture or kill Arminius, who escaped. There were Chauci among the Roman auxiliaries, and they were rumored to have allowed the escape. In one of the campaigns a Roman fleet (probably riverine, not ocean-going) was broken up by a storm, causing many casualties. Germanicus himself managed to survive by reaching the lands of the Chauci, who provided him with a safe haven.
A parenthetical note concerns the Ampsivarii. They had not supported the German cause led by Arminius in 9 AD and had been ostracized as a result. The Chauci had suffered no such disaffection from the other Germanic tribes in the aftermath of Teutoburg Forest, nor had they alienated the Romans. Many years later, c. AD 58, the Chauci seized an opportunity to expel the Ampsivarii and occupy their lands at the mouth of the River Ems, whereby they gained a border with the Frisians to the west.
 Roman war against Gannascus, c. 47
In AD 47 (and perhaps for some time earlier), the Chauci along with the Frisians were led by a certain Gannascus of the Canninefates. They raided along the then-wealthy coast of Gallia Belgica (i.e., the land south of the Rhine and north of the Rivers Marne and Seine), and the Chauci made inroads into the region that would later become the Roman province of Germania Inferior (which mostly consisted of the modern southern Netherlands).
Corbulo was made the local Roman military commander. He successfully engaged the Germans on both land and water, occupied the Rhine with his triremes and sent his smaller vessels up the estuaries and canals. The Germanic flotilla was destroyed in a naval engagement, Gannascus was driven out, and Frisian territory was forcibly occupied.
A negotiation between the Romans and Gannascus was arranged under the auspices of the 'Greater Chauci', which the Romans used as an opportunity to assassinate their opponent. The Chauci were outraged by the act of bad faith, so the emperor Claudius forbade further attacks on the Germans in an effort to ease tensions, and the Romans withdrew to the Rhine.
 Batavian Revolt, c. 69
In AD 69 the Batavi and other tribes rose against Roman rule in the Revolt of the Batavi, becoming a general uprising by all the Germans in the region. Led by Civilis, they inflicted huge casualties on the Romans, including the destruction of a Roman fleet by a Germanic one off the North Sea coast. Led by Cerialis, the Romans gave as good as they had gotten, ultimately forcing a humiliating peace on the Batavi and stationing a legion on their territory.
Both the Chauci and the Frisians had auxiliaries serving under the Romans, and in a siege and assault by Civilis at Colonia Claudia Ara Agrippinensis (at modern Cologne), a cohort of Chauci and Frisians had been trapped and burned. The Chauci had supported Civilis in their own name, providing him with reinforcements.
 Sea raiding
The Chauci were one of the most prominent early Germanic sea raiders. They are probable participants in the Germanic flotilla that was destroyed by Drusus in 12 BC. They were raiding the coasts of Roman Belgica in AD 41, long before they participated in further raids of the same coasts under Gannascus in AD 47. It is likely that their raiding was endemic over the years, as the few surviving accounts probably do not reflect all occurrences. Tacitus describes the Chauci as 'peaceful' in his Germania (AD 98), but this is in a passage describing the non-coastal, inland Chauci, whereas sea raiders are necessarily a coastal people.
By the late 2nd century Chauci raiding was ongoing and more serious than before, continuing in the North Sea Channel until their last recorded raids c. 170–175. While there are no historical sources to inform us one way or the other, it is likely that the Chauci continued their raiding until they were replaced by Frankish and Saxon raiders in the 3rd century.
There is archaeological evidence of destruction by raiders between 170–200, ranging along the Continental coast down to the Bay of Biscay, to northwest Belgica (e.g., fire destruction at Amiens, Thérouanne, Vendeuil-Caply, Beauvais, Bavai, Tournai and Arras), to coastal Britain (e.g., fire destruction at the eastern Essex sites of Chelmsford, Billericay, Gestingthorpe, Braintree, Wickford, Kelvedon, Great Chesterford and Harlow). The perpetrators are unknown, but Chauci raiders are among the prime suspects.
The Romans responded with defensive measures. Caistor-by-Norwich, Chelmsford and Forum Hadriani (present day Voorburg) (the civitas of the Canninefates near The Hague) were all fortified c. 200, and the Romans began a defensive system of protection especially along the coasts of Britain and the Continent. This system would be continually maintained and improved upon, which the Romans would not have done unless there was a continuing threat to be addressed. The system would continue to evolve through the disappearance of Chauci raiders and their replacement by the Frankish and Saxon ones, up to the end of the 4th century. By then it would be known as the Saxon Shore, a name given it by the Notitia Dignitatum.
 In literature
Beowulf is an Old English heroic poem where the hero (Beowulf) engages in battles with antagonists. Set in long-ago Scandinavia, it makes frequent references to the peoples who are a part of the story, and efforts have been made to connect those peoples with peoples mentioned in ancient historical records. The "Hugas" of the poem are said to be a reference to the Chauci.
 See also
- Haywood 1999:14, Dark Age Naval Power. Haywood uses the term 'North German' to distinguish them from the 'Rhine Germans' (the Caninnefates, Batavians, and "Frankish" tribes).
- Haywood 1999:17–19, Dark Age Naval Power. Haywood cites Todd's The Northern Barbarians 100 BC–AD 300 (1987) for this conclusion.
- Tacitus 117:253–254, The Annals, Bk XIII, Ch 55. Events of AD 54–58. The Germans under Arminius had wiped out 3 Roman legions under Varus at the Battle of the Teutoburg Forest. The Ampsivarii had not supported the German cause and had been ostracised as a result. Many years later, c. AD 58, the Chauci then took the opportunity to expel them and occupy their land at the mouth of the River Ems.
- Haywood 1999:17–19, Dark Age Naval Power. Haywood cites Tacitus as well as a number of other sources.
- Tacitus 117:355, The Annals, Translator's note on Bk XI, Ch 19.
- Haywood 1999:28, Dark Age Naval Power.
- Tacitus 117:253, The Annals, Bk XIII, Ch 54. Events of AD 54–58.
- Haywood 1999:19–20, Dark Age Naval Power. The referenced footnote notes that the Chauci heartland between the Elbe and Weser contained huge cremation cemeteries with a uniform range of poor quality grave goods. In the 2nd century aristocratic cemeteries with rich grave goods appear.
- Yorke, Barbara (2006), in Robbins, Keith, The Conversion of Britain: Religion, Politics and Society in Britain c.600–800, Harlow: Pearson Education Limited, p. 59, ISBN 978-0-582-77292-2
- Pliny the Elder 79_1:346–347, Natural History, Bk IV, Ch 28: Germany. A footnote suggests that the two references to the Cimbri in two different groups were not references to the same people.
- Tacitus 98:61–62, The Germany, XXXV.
- Pliny the Elder 79_3:339, Natural History, Bk XVI, Ch I: Countries that have no trees. Pliny also notes that the Chauci lived between the Rivers Ems and Elbe.
- Cassius Dio 229:365, Roman History, Bk LIV, Ch 32.
- Tacitus 117:30, The Annals, Bk I, Ch 60. Events of AD 15–16.
- Tacitus 117:48, The Annals, Bk II, Ch 17. Events of AD 16–19
- Tacitus 117:50, The Annals, Bk II, Ch 24. Events of AD 16–19.
- Tacitus 117:253–254, The Annals, Bk XIII, Ch 55. Events of AD 54–58.
- Tacitus 117:189, The Annals, Bk XI, Ch 18–19. Events of AD 47–48.
- Tacitus 117:400, The Annals, Bk XVI, Ch 17. Events of 65–66 (Rome and Parthia—Campaigns of Corbulo in the East). Tacitus makes the parenthetical comment that Corbulo had driven the Chauci out of the provinces of Lower Germany which they had invaded in AD 47.
- Tacitus 117:190, The Annals, Bk XI, Ch 18–19. Events of AD 47–48.
- Haywood 1999:22–23, Dark Age Naval Power.
- Tacitus 105:7, The Histories, Translator's Summary of Chief Events.
- Tacitus 105:193, The Histories, Bk IV, Ch 79.
- Tacitus 105:222, The Histories, Bk V, Ch 19. A footnote makes reference to "Cp IV.79".
- Haywood 1999:15, Dark Age Naval Power.
- Haywood 1999:21, Dark Age Naval Power.
- Tacitus 98:61–62, The Germany, XXXV.
- Haywood 1999:28, Dark Age Naval Power.
- Haywood 1999:24, Dark Age Naval Power.
- Haywood 1999:24–25, Dark Age Naval Power.
- Haywood 1999:24–28, Dark Age Naval Power.
- Lumsden, H. W. (1881), "The Fire Drake (Part III)", Beowulf, An Old English Poem, translated into modern rhymes, London: C. Kegan Paul & Co., p. 77
- Cassius Dio (229), in Cary, Earnest (translator), Dio's Roman History VI, London: William Heinemann (published 1917)
- Haywood, John (1999), Dark Age Naval Power: Frankish & Anglo-Saxon Seafaring Activity (revised ed.), Frithgarth: Anglo-Saxon Books, ISBN 1-898281-43-2
- Pliny the Elder (79), in Bostock, John; Riley, H. T., The Natural History of Pliny I, London: Henry G. Bohn (published 1855)
- Pliny the Elder (79), in Bostock, John; Riley, H. T., The Natural History of Pliny III, London: George Bell and Sons (published 1892)
- Schmitz, Leonhard (1853), "CHAUCI", in Smith, William, A Dictionary of Greek and Roman Geography I, London: John Murray (published 1872), pp. 605–606
- Tacitus, Publius Cornelius (98), The Germany and the Agricola of Tacitus (revised translation, with notes), Chicago: C. M. Barnes Company (published 1897)
- Tacitus, Publius Cornelius (105), in Fyfe, W. Hamilton (translator), The Histories II, Oxford: Clarendon Press (published 1912)
- Tacitus, Publius Cornelius (117), in Church, Alfred John; Brodribb, William Jackson, Annals of Tacitus (translated into English), London: MacMillan and Co. (published 1895)