The Battle of Wisby took place on July 27, 1361, on the island of Gotland, part of present-day Sweden. It was fought between the forces of the Danish King Valdemar IV and the defenders of the town of Wisby, who were primarily composed of local militia and mercenaries. The battle was part of a larger conflict over control of the Baltic Sea and trade routes. The Danish forces achieved a decisive victory, leading to significant casualties among the defenders. Following the battle, many of the captured defenders were executed, and the town of Wisby suffered extensive damage. This battle marked a significant moment in the struggle for dominance in the region.