Ultimately, what led to the colonies' victory in the american revolution?

The two main factor that aided America's victory in the Revolution was the distance between Britain and American and support from the French. Since the war was fought in America, the Americans were on home soil and knew it better. It also meant that the British would have to travel across the Atlantic and retreat back for supplies and more men, which was quite inconvenient. However, the main reason for the victory was France's naval assistance and aid towards the end of the war. The British had one of the best navies at the time, it wasn't until the French helped out and assisted in the war that America was able to gain victory.