George Washington was a great leader. He commanded the revolutionary forces to victory against the British.
But Washington was actually a terrible military strategist and tactician.
Right from the start of his military career, Washington showed that he was prone to military blunders, and he failed to recognize good military advice when others provided it.
Washington actually lost more battles than he won during the revolutionary war.
And it took him 8 years (1775-1783) to finally prevail.
What made Washington a great leader was his persistence.
Setbacks, defeat, betrayal, and failure did not deter Washington. He kept hope alive against all odds. Even when it seemed like all was lost, he persisted.