The Conquest of Kalmar () took place on May 27, 1523 during the Swedish War of Liberation (1521-1523). In the beginning of 1523, Kalmar and Stockholm remained as the only real Danish strongholds in Sweden. The situation in Kalmar is tense, with many German Landsknechte mercenaries in Danish hire stationed in the city. These had been ordered that when the city was attacked, they would kill all burghers of Swedish origin, burn the city and castle, retreat and regroup in Visby, Gotland.