1. The alliance with France was really important because of the military power it gave to the United States, and not only that but it raised a lot of tension in other matters between the two European countries. Also the intervention of other nations like Spain and Netherlands turned the tide for the Americans a lot.
2. Military training and preparation is an element that can't be ignored, political issues were important but the performance on the battlefield was decisive for the outcome of the war, the war strategies and logistics were undoubtedly a key element in the victory of the colonials.
3. Political division in England as there was an internal conflict in the parliament as of the nature and future actions in the war.
4. The british alienated many potential supporters, like for example the Loyalist, who were almost 50.000 willing to defend and mantain control of the colonies, but they did not take advantage of that.
George Washington, Commander in Chief. (USA)
Nathanael Greene, General (USA)
Sir William Howe, Commander in Chief ( British forces)
Henry Clinton, Office, (British forces).
Events: Siege of Yorktown and Treaty of Paris.
This events were important because they marked the end of the war, they defined how the events were going to be in the future, how things were going to turn out in the future, the siege because of the surrender of more than 7000 men under Cornwallis command and after that event the battles in America decreased and died out and the Treaty because of how the war developed and concluded it geographically delimitated the territory that now we know as the United States of America.