France and Britain were at war because Britain wanted to stop France from gaining colonial control. Colonist disputes over land, the fur trade, relationships with aboriginal Americans, and fishing rights.
The question of whether the upper Ohio River valley belonged to the French Empire, in which case it was closed to trade and settlement by Virginians and Pennsylvanians, or the British Empire, was the one that sparked the French and Indian War.
The disagreement over colonial holdings in North America was the primary cause of the Anglo-French War. The possibility of trade with India served to inflame this rivalry even more.
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