The war gave the 13 colonies shared experience fighting together against a common enemy, uniting them in a way that had not previously happened. It also made British rule resentful of the colonies, as they were unsatisfied with their level of commitment and effort during the war. The war also left Britain overextended, with much more territory in the New World, and significant debt. As a result, the British put limits on westward expansion by the American colonists, creating resentment toward the British.