What was the main cause of the French and Indian War (1754-1763)

Causes of the French and Indian War. The French and Indian War began over the specific issue of whether the upper Ohio River valley was a part of the British Empire, and therefore open for trade and settlement by Virginians and Pennsylvanians, or part of the French Empire.

Explanation:

France was expanding into the Ohio River valley.

Explanation:

it was unclear whether the land was part of the British Empire or French Empire

which time period is this? or is this story fictional, i'm going to need more info to answer this question