| Knut Posse | |
| Birth Date: | early 1440s |
| Death Date: | March 25, 1500 |
| Birth Place: | Stockholm, Sweden |
| Death Place: | Kastelholm Castle at Åland |
| Placeofburial: | Turku Cathedral |
| Allegiance: |  Sweden |
| Rank: | General |
| Commands: | Commandant of Stockholm |
| Battles: |
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Knut Jönsson Posse (Finnish: Nuutti Posse; died 25 March 1500) was a Swedish general in Sweden and Finland remembered for the Vyborg Bang (1495) and for his surprise attack on the Danish Army at the Battle of Brunkeberg (1471).[1]
Knut Posse was appointed bailiff of Stockholm Castle in 1466 and in 1472 was bailiff at Hämeenlinna Castle. In 1490 he was appointed courtier at Kastelholm Castle and in 1495 Posse was governor of Viipuri castle. He lived until 1500 and died at Kastelholm Castle. He was buried at Turku Cathedral.
See main article: Battle of Brunkeberg. In 1471, Regent Sten Sture ordered Posse to load the garrison of Stockholm Castle onto boats to ready a surprise attack on the Danish and German Army of King Christian I of Denmark. His order were to attack the Danes in the rear from Stadsholmen. The Danes would then be attacked on three sides: Sten Sture would attack from the south, Nils Sture would flank the Danes and attack from the rear, and Posse would attack the Danes from the east flank. The Danish were completely surprised by Posse's attack. Soon after the battle started, Christian I sent more troops to reinforce their position near Sankta Klara kloster. The Danish Armies were no match for Posse's men, whom he led from the front. Posse's legs were hit by several Danish arrows. [2]
From 1495 to 1497, Posse was governor of Vyborg Castle, and commanded the garrison during the 1495 siege by forces of the Grand Duchy of Moscow. He successfully defeated the much larger Russian army by luring the attackers onto the walls and detonating an explosive mine under their feet, in what became known as 'the Vyborg Bang' (Swedish: Viborgska Smällen, Finnish: Viipurin pamaus).[3]