The Battle of Dupplin Moor was fought between supporters of King David II of Scotland, the son of King Robert Bruce, and English-backed invaders supporting Edward Balliol, son of King John I of Scotland, on 11 August 1332. It took place a little to the south-west of Perth, Scotland, when a Scottish force commanded by Donald, Earl of Mar, estimated to have been stronger than 15,000 and possibly as many as 40,000 men, attacked a largely English force of 1,500 commanded by Balliol and Henry Beaumont, Earl of Buchan. This was the first major battle of the Second War of Scottish Independence.

The Second War of Scottish Independence broke out in 1332, when Edward Balliol led an English-backed invasion of Scotland. Balliol, the son of former Scottish king John Balliol, was attempting to make good his claim to the Scottish throne. He was opposed by Scots loyal to the occupant of the throne, eight-year-old David II. At the Battle of Dupplin Moor Balliol's force defeated a Scottish army ten times their size and Balliol was crowned king. Within three months David's partisans had regrouped and forced Balliol out of Scotland. He appealed to the English king, Edward III, who invaded Scotland in 1333 and besieged the important trading town of Berwick. A large Scottish army attempted to relieve it but was heavily defeated at the Battle of Halidon Hill. Balliol established his authority over most of Scotland, ceded to England the eight counties of south-east Scotland and did homage to Edward for the rest of the country as a fief.