Siege of Älvsborg (1563)

Siege of Älvsborg
Part of the Northern Seven Years' War

Frederick II conquers Älvsborg, by Oskar Alin in 1889
Date1 – 4 September 1563
Location57°40′29″N 11°51′8″E / 57.67472°N 11.85222°E / 57.67472; 11.85222
Result Danish victory
Territorial
changes
Göta älv secured by Denmark-Norway
Belligerents
 Denmark-Norway  Sweden
Commanders and leaders
Frederick II
Daniel Rantzau
Günther XLI
Erik Kagge 
Units involved
Rantzau's Regiment Älfsborg garrison
Strength
Unknown, but large 700 men
32 cannons
Casualties and losses
Unknown 2 ships taken
32 cannons taken

The siege of Älvsborg (Swedish: Belägringen av Älvsborg), also known as the siege of Elfsborg (Danish: Belejringen af Elfsborg), was a siege of the Swedish fortress of Älfsborg by the Danish army under King Frederick II at the start of the Northern Seven Years' War. The siege ended in a quick Danish victory, and the Swedish commander would surrender the fort before any direct assault would be initiated.