as result of the french and indian war claimed all the land west of Mississippi river, and gained control of all land east of it
The statement you provided is not accurate. The French and Indian War, also known as the Seven Years' War (1756-1763), was a conflict between the British and the French, with various Native American tribes involved as well. The outcome of the war did not result in one side claiming all the land west of the Mississippi River while the other side gained control of all land to the east.
Instead, as a result of the French and Indian War, the British emerged victorious and gained significant territorial possessions. Under the terms of the Treaty of Paris in 1763, which officially ended the war, France ceded all of Canada and all lands east of the Mississippi River, except the city of New Orleans, to Britain. This meant that Britain gained control of all land east of the Mississippi River, including what is now known as the Thirteen Colonies.
While the British did gain extensive territory, it is important to note that Native American tribes still held significant influence over the lands they inhabited, and their control could not be simply disregarded or claimed by the British. The acquisition of this vast new territory by Britain also played a role in the tensions that eventually led to the American Revolution.