The French and Indian War began as tensions rose between France and Britain over control of the Ohio River Valley in the 1750s. George Washington was sent to defend Fort Duquesne but was forced to surrender after his makeshift fort at Fort Necessity was attacked. While the French and Indian allies initially had success, Britain gained the upper hand after their victory at the Battle of Quebec in 1759. The war ended with the Treaty of Paris in 1763, which ceded French North American territories to Britain.