The Battle of Bogesund is an important conflict in the campaign of Christian II to gain power over Sweden.

In 1520, Christian's army of mercenaries lands in Sweden, seeking to consolidate Christian's powers over Sweden within the Kalmar Union and to unseat the rebellious Swedish viceroy Sten Sture the Younger.

On the ice of lake Åsunden near Bogesund, Christian's army, led by Otte Krumpen, is intercepted by a force led by Sten Sture.Little is known of the details of the battle.

At an early stage, a cannonball ricochets off the ice, hitting Sten Sture in the leg and killing his horse.

Deprived of their leadership, Sture's forces (mostly armed peasants) fall into disarray and flee.

Sture himself retreats towards Stockholm, but dies of his wounds on the ice of lake Mälaren on February 5.The anti-union resistance is continued by Sture's widow Christina Gyllenstierna and ultimately Gustav Vasa.