The American Revolutionary War was won through a combination of strategic military victories by American forces and support from international allies like France. Key battles like Trenton, Saratoga, and Yorktown weakened the British military position. Meanwhile, the Americans utilized local knowledge and guerilla tactics to overcome disadvantages in training and equipment. The alliance with France after Saratoga provided critical aid in the form of troops, supplies, and naval support, tipping the war in favor of American independence.