Final answer:
The French and Indian War officially ended with the signing of the Treaty of Paris in 1763, which made Britain the dominant power in eastern North America and caused unrest among French Indian allies.
Step-by-step explanation:
The official end of the French and Indian War was marked by the signing of the Treaty of Paris in 1763. This significant treaty resulted in substantial changes on the North American continent, where Great Britain emerged as the dominant European power in eastern North America.
They gained control of all lands east of the Mississippi River, excluding New Orleans and Louisiana. Despite their victory, the treaty sparked protest from France's Indian allies, leading to underlying tensions and hostilities that simmered even after the European conflict had ended.