Why did most of the Native Americans side with the British?

Some Indian tribes were divided over which side to support in the war, such as the Iroquois Confederacy based in New York and Pennsylvania who split: the Oneida and Tuscarora sided with the American Patriots, and the Mohawk, Seneca, Cayuga, and Onondaga sided with the British.

The British promised the Native Americans that they would control the expansion of settlers into Indian land.