Answer:
The Great War for the Empire, 1754-1763 (otherwise known as the French and Indian War, or in Britain as the Seven Years’ War) eliminated French power from North America and extended British power to all territories east of the Mississippi river.
Ironically, the completeness of the British victory set the scene for the elimination of British power from what would become the USA a mere two decades later.
C through the Louisiana purchase in 1803
