John Stewart, Earl of Buchan (c. 1381 – 17 August 1424) was a Scottish nobleman and soldier who fought alongside the Kingdom of France during the Hundred Years War.

Stewart led the combined Franco-Scottish army at the Battle of Baugé on 21 March 1421, where he comprehensively routed an English force under Thomas of Lancaster, Duke of Clarence.

However, two years later, Stewart was defeated and captured by an English force led by Thomas Montacute, 4th Earl of Salisbury at the Battle of Cravant in 1423.

[1] John's father, Robert Stewart, Duke of Albany, was grandfather to Euphemia II, Countess of Ross and persuaded her to resign her rights to his son, despite the superior claim of Donald of Islay, Lord of the Isles.

In 1419 Stewart's father sent him to France with an army of 6,000 men to fight in the Hundred Years' War, sailing to La Rochelle in a Spanish fleet.

[2] At first Stewart's soldiers prove unpopular amongst the French, owing to their fondness for food and drink,[2] but success in battle would make the Scottish army extremely welcome in France.

Buchan confronted a combined Anglo-Burgundian army at the village of Cravant in Burgundy, at a bridge and ford on the banks of the river Yonne, a left-bank tributary of the Seine, southeast of Auxerre.

Salisbury finally took the initiative and his army began to cross the waist-high river, some 50 metres wide, under a covering hail of arrows from English archers.

Buchan and his generals unwisely chose to face the English army, led by John of Lancaster, 1st Duke of Bedford in open battle.