Torstenson War

Torstenson War
Part of Dano-Swedish Wars and Thirty Years' War
Date1643–1645
Location
Result Swedish victory
Territorial
changes
Jämtland, Härjedalen, Idre, Särna, Gotland, and Ösel become Swedish territories. Halland ceded to Sweden for a period of 30 years as a guarantee.
Belligerents
Swedish Empire Denmark–Norway
Commanders and leaders
Christina
Lennart Torstenson
Gustav Horn
Carl Gustaf Wrangel
Helmut Wrangel
Maerten Thijssen
Christian IV
Hannibal Sehested
Anders Bille
Ebbe Ulfeldt
Jacob Ulfeld
Matthias Gallas
Strength
24,600 32,000

The Torstenson War, 1643 to 1645, was fought between Sweden and Denmark–Norway. The name derives from Swedish general Lennart Torstenson, and it is considered a related conflict of the Thirty Years' War.

Denmark–Norway had withdrawn from the Thirty Years' War in the 1629 Treaty of Lübeck. After its victories in the war, Sweden felt it had to attack Denmark–Norway due to its advantageous geographical position in relation to Sweden. Sweden invaded in a short two-year war. In the Second Treaty of Brömsebro (1645), which concluded the war, Denmark–Norway had to make huge territorial concessions and exempt Sweden from the Sound Dues, de facto acknowledging the end of the Danish-Norwegian, and the start of the Swedish, dominium maris baltici. Dano–Norwegian efforts to reverse this result in the Second Northern, Scanian and Great Northern wars failed.