Washington knew how to work with what he didn’t have. Understanding his genius first requires the ability to see what he was doing, which most miss, because so much of it was when he didn’t do something, or how he didn’t do it. he wasn’t just fighting the British Army - he was also fighting the Tories in the Colonies, kind of like conservatives having to fight both the Democrats and the RINOs. They’re both on the same side, but taking different appraoches to the battle. If you can’t see the difference, you can’t see how to deal with it. Washington could see it.
Washington’s genius lay in his strategic vision, not his tactical capabilities. He realized that to win, he only had to survive and keep the army together. It was a successful strategy adopted by the North Vietnamese. Washington knew that between the fence-sitters in America and the disenchanted British politicians and public, the redcoats lost ground every year the war went on. Also, there is a new study of the Brit logistics train that argues it had become over extended and could no longer support the army as it had in 1775-1776.