Why did so many native americans choose to fight for the british

So many Native Americans chose to fight for the British because the British promised that they would control the Westward Expansion. The British said that they would control the colonists going into Native American lands.

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.

answer; taking up arms to defend the nation;