The main cause of the French and Indian War, fought between 1754 and 1763, was territorial disputes between the British and French empires in North America. Both powers sought to expand their influence and control over the lucrative Ohio River Valley. Tensions escalated as both sides, supported by various Native American tribes, engaged in skirmishes along the frontier. The war emerged as a pivotal conflict in the larger Seven Years' War, ultimately resulting in British dominance in North America. The costly outcome led to increased taxes on the American colonies, sowing seeds of discontent that contributed to the American Revolution.