The historical event that led to the United States gaining independence from Britain is the American Revolutionary War, which lasted from 1775 to 1783. The conflict arose from growing tensions over British taxation and governance, sparking a desire for self-determination among American colonists. Key events, such as the Boston Tea Party and the Continental Congress, fueled revolutionary sentiment. With the Declaration of Independence in 1776, the colonies officially asserted their right to be free from British rule. The war ultimately culminated in the Treaty of Paris in 1783, which recognized the sovereignty of the United States and marked a turning point in global history.