Battle of Boroughbridge

The Battle of Boroughbridge was fought on 16 March 1322 in England between a group of rebellious barons and the forces of King Edward II, near Boroughbridge, north-west of York. The culmination of a long period of antagonism between the King and Thomas, Earl of Lancaster, his most powerful subject, it resulted in Lancaster's defeat and execution, ending the Despenser War. This allowed Edward to re-establish royal authority and hold on to power for almost five more years.

Though not a part of the Wars of Scottish Independence, the battle is significant for its employment of tactics learned in the Scottish wars in a domestic, English conflict. Both the extensive use of foot soldiers rather than cavalry and the heavy impact caused by the longbow represented significant steps in military developments.

Source: Wikipedia