John Comyn III of Badenoch, nicknamed the Red, was a leading Scottish baron and magnate who played an important role in the First War of Scottish Independence. He served as Guardian of Scotland after the forced abdication of his uncle, King John Balliol, in 1296, and for a time commanded the defence of Scotland against English attacks. Comyn was stabbed to death by Robert the Bruce before the altar at the church of the Greyfriars at Dumfries, once it had been declared that Comyn had more connection to King David of Scotland and therefore should be the next King of Scotland, not Robert.

The First War of Scottish Independence was the first of a series of wars between English and Scottish forces. It lasted from the English invasion of Scotland in 1296 until the de jure restoration of Scottish independence with the Treaty of Edinburgh–Northampton in 1328. De facto independence was established in 1314 at the Battle of Bannockburn. The wars were caused by the attempts of the English kings to establish their authority over Scotland while Scots fought to keep English rule and authority out of Scotland.