The Americans won the Revolutionary War mainly because of what?

There are many factors that lead to their success, and it could be argued that one is more important that the other. But I think that it was that they were fighting for what they wanted on their own ground. They were so motivated because of this and this is what caused them to win. And they knew this land better than anyone. Also because of their war tactics (such as guerrilla warfare).

When they gained control of the hill