The significant treaty that ended the Seven Years' War was the Treaty of Paris signed in 1763. This treaty marked a major shift in colonial power dynamics by redrawing territorial lines in North America. France ceded Canada and its territories east of the Mississippi River to Great Britain, while Spain ceded Florida to Britain in exchange for the return of Havana. The treaty significantly reduced French influence in North America and established Great Britain as the dominant colonial power. This shift laid the groundwork for future American expansion and contributed to rising tensions between Britain and its American colonies, ultimately leading to the American Revolution.