On this day, June 24, in medieval history:
- 1148 – A general council of Christian princes and military leaders was held at Acre, where it was decided that all available forces would be used to conquer the city of Damascus. Read the account from William of Tyre as he recalls the fiasco at Damascus.
- 1314 – Battle of Bannockburn: Robert I (the Bruce) of Scotland defeated the English led by King Edward II
- 1340 – Battle of Sluys: In one of the opening conflicts of the Hundred Years’ War, the English navy destroyed France’s fleet, ensuring that France could not invade England and that the war would mostly be fought on French soil