This is a list of wars fought by the realm of Sweden. There are legendary accounts of Swedish kings well into prehistory and they are mentioned by Tacitus in his Germania, but St. Olof Skötkonung (995–1022) was the first ruler documented to have been accepted by both the Swedes around Lake Mälaren and by the Geats around Lake Vättern. The modern state of Sweden considers itself to have been established on 6 June 1523 by the acclamation of Gustav Vasa as king which finally ended the Kalmar Union with Denmark, although the current Swedish constitution dates from only 1974.
Note that the military engagements since 1814 have not been formally declared wars.
| Year | War | Conclusion |
|---|---|---|
| 11th century | ||
| 1015–1018 | Norwegian-Swedish War | Treaty of Kungahälla (1020) |
| 12th century | ||
| c. 1150 | "First Swedish Crusade" | |
| 1187 | Oeselians invade Sigtuna | |
| 13th century | ||
| 1218–1226 | Livonian Crusade | |
| c. 1250 | Second Swedish Crusade | |
| 14th century | ||
| 1142–1322 | Swedish–Novgorodian Wars, including the "Third Swedish Crusade" | Treaty of Nöteborg (1323) |
| 15th century | ||
| 1495–1497 | Russo-Swedish War (1495–1497) | Eternal Peace of 1508 |
| 16th century | ||
| 1521–1523 | Swedish War of Liberation (Befrielsekriget) | Armistice of Gotland (1524) Recess of Malmö (1524) |
| 1534–1536 | Danish Count's Feud (Danska Grevefejden) | Armistice of Copenhagen (1537) |
| 1554–1557 | Great Russian War (Stora ryska kriget) | Treaty of Novgorod (1557) |
| 1563–1570 | Northern Seven Years' War (Nordiska sjuårskriget) | Treaty of Stettin (1570) |
| 1570–1595 | Livonian War and Russo-Swedish War (1590–1595) (25-årskriget mot Ryssland) |
Treaty of Teusina (1595) |
| 1598–1599 | War against Sigismund (Kriget mot Sigismund) | Armistice of Stångebro (1598) |
| 17th century | ||
| 1600–1629 | Polish War (Polska kriget) | Armistice of Altmark (1629) |
| 1609–1610 | De la Gardie Campaign (De la Gardieska fälttåget) | |
| 1610–1617 | Ingrian War (Ingermanländska kriget) | Treaty of Stolbovo (1617) |
| 1611–1613 | Kalmar War (Kalmarkriget) | Treaty of Knäred (1613) |
| 1630–1648 | Thirty Years' War (Trettioåriga kriget) |
|
| 1643–1645 | Torstenson War (Torstensonkriget) | Treaty of Brömsebro (1645) |
| 1654 | First Bremian War (Första bremiska kriget) | Recess of Stade (1654) |
| 1655–1661 | Second Northern War (Nordiska krigen)
|
|
| 1666 | Second Bremian War (Andra bremiska kriget) | Treaty of Habenhausen (1666) |
| 1667–1668 | War of Devolution (Devolutionskriget) | |
| 1674–1679 | Scanian War (Skånska kriget) |
|
| 1688–1691 | War of the Grand Alliance (Pfalziska tronföljdskriget) | |
| 18th century | ||
| 1700–1721 | Great Northern War (Stora nordiska kriget) |
|
| 1741–1743 | Hats' Russian War (Hattarnas ryska krig) | Treaty of Åbo (1743) |
| 1757–1762 | Seven Years' War (Pommerska kriget) | Treaty of Hamburg (1762) |
| 1788–1790 | Gustav III's Russian War (Gustav III:s ryska krig) | Treaty of Värälä (1790) |
| 1788–1789 | Theater War (Teaterkriget) | |
| 19th century | ||
| 1801–1802 | First Barbary War (Barbareskkriget 1801–1805) | |
| 1805–1810 | War of the Fourth Coalition (Första napoleonkriget) | Treaty of Paris (1810) |
| 1808–1809 | Finnish War (Finska kriget) |
|
| 1808–1809 | Dano-Swedish War of 1808-1809 (Dansk-svenska kriget 1808–1809) | |
| 1810–1812 | War against United Kingdom (Kriget mot Storbritannien) | Treaty of Örebro (1812) |
| 1813–1814 | War of the Sixth Coalition (Andra napoleonkriget) |
|
| 1814 | Campaign against Norway (Fälttåget mot Norge) | Convention of Moss (1814) |
| 20th century | ||
| 1961–1964 | Congo Crisis | debellation of the State of Katanga |
| 21st century | ||
| 2001–present | War in Afghanistan | ongoing |
| 2011 | 2011 Libyan civil war | debellation of the Libyan Arab Jamahiriya |
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—F. Scott Fitzgerald (1896–1940)
“The advice of their elders to young men is very apt to be as unreal as a list of the hundred best books.”
—Oliver Wendell Holmes, Jr. (1841–1935)
“We have to have wars now and then just to prove we’re top dog.”
—Reginald Berkeley (1890–1935)
“Literature is a defense against the attacks of life. It says to life: “You can’t deceive me. I know your habits, foresee and enjoy watching all your reactions, and steal your secret by involving you in cunning obstructions that halt your normal flow.””
—Cesare Pavese (1908–1950)