Who were the british allies and how did they them to win so many battles?

The British were not really allied to anyone with the possible exception of indians like the Mohawks and the Shawnee if you choose to consider them allies. Canada may be considered an ally but it was a revolution and so, prerevolution Canada was just like prerevolution America's thirteen colonies. They did use German troops but at that time there was no Germany. Germany as it exists today was a collection of states ruled by their own kings. The Germanic state of Hessen sent troops to help the British but the British had to pay Hessen for it..