The French and Indian War, also known as the "Seven Years War", was a war that took place from 1754-1763. The actual war was nine years long, but the main conflict between the two sides was from 1756-1763. The war started with a dispute between France and Great Britain for control of the Allegheny and Monongahela rivers, also called the Forks of the Ohio, and the dispute also covered Fort Duquesne which was located where present day Pittsburgh is. This dispute caused the first battle and the start of the war, the Battle of Jumonville Glen in May of 1754, where George Washington's Virginia militiamen ambushed a French patrol.