Why ere the French and British at war?

They fought for control of North America and the rich for trade.

Explanation:

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.

after defeating german forces in north africa allied leaders turned their attention to "italy," since this was the location that made the most geographic sense before invading northern europe via france. 

after the senate and the house passed different bills and deadlock threatened, a compromise bill was worked out with the following provisions: (1) missouri was admitted as a slave state and maine (formerly part of massachusetts).