What british policy convinced many american colonists to want to form their own country

Answer to this question… Great Britain did not allow the colonists to participate in government.

One British policy that convinced many American colonists to want to form their own country was that. ''Great Britain did not allow the colonists to participate in government," since the main colonial grievance was "no taxation without representation" 

on april 6, 1917, the u.s. joined its allies--britain, france, and russia--to fight in world war i. under the command of major general john j. pershing, more than 2 million u.s. soldiers fought on battlefields in france.