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The Kalmar War (1611–1613) was a war between Denmark–Norway and Sweden. Though Denmark soon gained the upper hand, it was unable to defeat Sweden entirely. The Kalmar War was the last time Denmark successfully defended its dominium maris baltici against Sweden, and also marked the increasing influence of the Maritime Powers on Baltic politics.
Since Denmark–Norway controlled the strait between the Baltic Sea and the North Sea, Sweden sought an alternative trade route through sparsely populated Lapland to avoid paying Denmark's Sound Dues. In 1607, Charles IX of Sweden declared himself "King of the Lapps in Nordland" and began "collecting" taxes in Norwegian territory, even south of Tromsø.
Since the Sound Dues were Denmark's main source of income, Denmark did not want to see alternative trade routes established, particularly when established through Norwegian territory. Denmark protested.
King Charles IX of Sweden ignored the protests of King Christian IV of Denmark and Norway. Finally, in April 1611, in response to Sweden's claim of a traditionally Dano-Norwegian area in Northern Norway, Denmark declared war upon Sweden and invaded.
The war's beginnings
The Danish side planned to attack Sweden on three fronts; from Kristianopel towards Kalmar, from Halmstad towards Jönköping and from Norway towards the fortress of Älvsborg and thereafter further into Västergötland.
A force of 6,000 Danish troops laid siege on the city of Kalmar, ultimately taking it. Unlike the swedish forces, the Danes did not participate with mercenaries due to Christian IV distrust in foreigners. Norwegian forces, although stationed on the border, were instructed not to enter Sweden.
In the summer of 1611, Swedish forces under Baltzar Bäck were ordered to invade Norwegian Jämtland. They did so, and armed Swedish peasants marched into Härjedalen. Both Jämtland and Härjedalen were conquered without much fight. However, Bäck's lack of ability, or will, to stop excesses against the population meant that the locals eventually rose up against the Swedish occupants. In the end, the Swedish troops could not handle the situation and were forced to leave Jämtland/Härjedalen in the fall of 1612.
On October 20, 1611, King Charles IX of Sweden died and was succeeded by his son, Gustavus Adolphus. On ascending the throne, Gustavus Adolphus sued for peace, but Christian IV saw an opportunity for larger victories, and strengthened his armies in southern Sweden. In response, Gustavus began conducting raids along the border between Denmark and Sweden. In a February raid, Gustavus nearly drowned at the Battle of Vittsjö after being surprised by a Danish army.
In early 1612, Denmark attacked and eventually conquered two fortresses on the border between the fighting countries, Älvsborg and Gullberg, both in present-day Gothenburg. This was a major setback for Sweden, as the country now lacked access to the sea in the west. Having achieved this success, and aiming to end the war as soon as possible, the Danish command ordered an attack deep into Sweden, towards the capital of Stockholm. However, this proved to be a failure. Scorched earth methods and guerrilla warfare from the Swedish side made this a very difficult task and many of the mercenaries in the Danish army deserted since they did not receive their pay. Thus, the Danish army could never mount a serious attack on the capital itself.
Peace of Knäred
England and the Dutch Republic were also invested in the Baltic Sea trade, and pressured to curtail Denmark's power by ending the Kalmar War before a decisive victory could be attained. The Danes, while well-equipped and strong, had relied heavily on mercenary forces and Christian IV, low on funds, was finally amenable to persuasion in 1613. With the intercession of James I of England, the Treaty of Knäred was signed on January 20, 1613.
Denmark reached its victory, restoring Norwegian control of Sweden's land route through Lapland by incorporating Lapland into Norway (and thus under Danish rule). Further, Sweden had to pay a high ransom for two fortresses (Alvsborg and Gothenburg) captured by Denmark. Sweden, however, achieved a major concession — the right of free trade through the Sound Strait, becoming exempt from the Sound toll.
One of the results coming out of the Kalmar War was the establishment of Denmark as a competent army recognized throughout Europe. The rise of the Maritime Powers including Great Britain and the Dutch established a rivalry for power in the Baltic Sea. Archduke Albert of the Habsburgs sought out aid from the Hanseatics in order to challenge the military prowess of King Christian IV.
Because the Dano-Norwegian Alliance did not achieve a total overall victory, Sweden would recover under Gustavus Adolphus. Surprisingly enough, Sweden and the Danish and Norwegians would enter into a brief alliance in the coming Thirty Years' War. The Kalmar War marked the last victory for the Dano-Norwegian Alliance against Sweden until 1814 when Norway would at last be pulled into a union with Sweden in the Treaty of Kiel.
The Kalmar War as well as the Northern Seven Years' War marked the beginning of centuries of rivalry between the Norwegians and the Swedes which greatly influenced the machinations of the personal union between the two countries after the Dano-Norwegian loss in 1814. Rather than ceding Norway to Sweden like what was agreed upon in the Treaty of Kiel, Norway denied being ruled under Sweden and rebelled in a short war known as the Campaign against Norway. This would result in a treaty allowing Norway to keep most of its sovereignty while only being loosely being held in union with Sweden. Denmark’s successful defense of its Dominium maris baltici gathered much attention from surrounding countries since the Baltic Sea was a lucrative trade route. This led to Sweden’s counterattack in the Torstenson War where Denmark would lose and cede control of the Baltic Sea to the King of Sweden. Other powers opposed Denmark and Sweden’s vie for total control of power of the Baltic Sea and would eventually intervene in this rivalry.
In popular memory
Although a side-note to the war, the Battle of Kringen, in which Scottish mercenary forces were defeated by Gudbrandsdal militiamen from Lesja, Dovre, Vaage (Vågå), Fron, Lom and Ringebu is a noted military event in Norway, celebrated to this day.
- Eriksson, Bo (2007). Lützen 1632 (in Swedish). Stockholm: Norstedts Pocket. pp. 67–73. ISBN 978-91-7263-790-0.
- The Cambridge Modern History. New York: The Macmillan Company. 1906. p. 179.
- Duerloo, L. Dynasty and Piety Archduke Albert (1598-1621) and Habsburg Political Culture in an Age of Religious Wars. Farnham, Surrey, England: Ashgate, 2012.
- Cavell, Janice (December 2008). "Historical Evidence and the Eastern Greenland Case" (PDF). ARCTIC 61 (4): 433– 441. Retrieved 19 June 2010
- Ulf Sundberg: Svenska krig 1521-1814 [Swedish Wars 1521-1814]
- The Struggle for Supremacy in the Baltic: 1600–1725, by Jill Lisk; Funk & Wagnalls, New York, 1967
- History of the Norwegian People by Knut Gjerset, The MacMillan Company, 1915, Volume I, pages 197 – 204.