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The Battle of Bannockburn (Blàr Allt a' Bhonnaich in Gaelic) (24 June 1314) was a significant Scottish victory in the Wars of Scottish Independence. It was the decisive battle in the First War of Scottish Independence.
Around Lent of 1314 Edward Bruce, brother of the Scottish king, began the siege of Stirling Castle, which was commanded by Sir Philip Mowbray. Unable to make any headway, Bruce agreed to a pact with Mowbray - if no relief came by midsummer 1314, the castle would surrender to Bruce. By this arrangement, Bruce may have believed that he had bought a cheap victory; it was now two years since an English army had come to Scotland, and King Edward II of England had recently been on the verge of war with his barons after the murder of Piers Gaveston in the summer of 1312.
Stirling was of vital strategic importance and its loss would be a serious embarrassment to the English. The time allowed in the Bruce-Mowbray pact was ample for Edward to gather a powerful army. In England, Edward and his barons reached an uneasy peace and made ready.