The Battle of Jumonville Glen, also known as the Jumonville affair, was the opening battle of the French and Indian War, fought on May 28, 1754, near present-day Hopwood and Uniontown in Fayette County, Pennsylvania. A company of provincial troops from Virginia under the command of Lieutenant Colonel George Washington, and a small number of Mingo warriors led by the chieftain Tanacharison (also known as the "Half King"), ambushed a force of 35 Canadiens under the command of Joseph Coulon de Jumonville.