The French and Indian War was a conflict between France and Britain for control of North America in the 18th century. France and Britain both claimed land in the Ohio Valley, leading to clashes between their forces. The war expanded into a global conflict known as the Seven Years' War. Key battles included the British defeat at Fort Duquesne in 1754 and their victory at Quebec in 1759. The Treaty of Paris in 1763 ended the war, ceding French North American territories to Britain. This shifted the balance of power in North America and had long-term effects on British-colonial relations.