Who gained control of lands east of the Mississippi River as a result of the French and Indian War?

That would be the french because the indians didnt have the weaponry to fend for themselves therefor they could not win.

The war resulted in the French loss of all French possessions in North America except for some Caribbean islands and Saint Pierre and Miquelon, two small islands off Newfoundland. The British acquired Canada while the Spanish gained Louisiana in compensation for its loss of Florida to the British. The result of the war is that Britain acquired a large Francophone population in Quebec and, near the beginning of the war in 1755, expelled French speaking populations in Acadia to Louisiana, creating the Cajun population.