The Battle of Stirling Bridge was a battle of the First War of Scottish Independence. On 11 September 1297, the forces of Andrew Moray and William Wallace defeated the combined English forces of John de Warenne, 6th Earl of Surrey, and Hugh de Cressingham near Stirling, on the River Forth.

Wallace went on to lead a destructive raid into northern England which did little to advance the Scots objectives, however the raids frightened the English army and stalled their advance. By March 1298 he had emerged as Guardian of Scotland. His glory was brief, for King Edward himself was coming north from Flanders. The two men finally met on the field of Falkirk in the summer of 1298, where Wallace was defeated.

Kingdom of Scotland

5,300 to 6,300 men (~300 cavalry, ~5,000 to 6,000 infantry)

Kingdom of England

9000 men (~2,000 cavalry, ~7,000 infantry)

More Info: en.wikipedia.org