The signing of the Treaty of Paris in 1763 marked a significant shift in North American territory, ending the French and Indian War. The treaty ceded Canada and all French territories east of the Mississippi River to Great Britain, greatly expanding British holdings in North America. France retained only a few small islands, while Spain ceded Florida to Britain but acquired Louisiana west of the Mississippi. This reconfiguration escalated British dominance in North America, leading to new colonial policies that would ultimately fuel colonial dissent and contribute to the American Revolution.