The major event that began in 1775 and ended in 1783 in North America was the American Revolutionary War. This conflict arose from growing tensions between the Thirteen Colonies and Great Britain due to issues like taxation without representation, lack of political autonomy, and British military presence. The war involved significant battles, such as those at Lexington and Concord, Saratoga, and Yorktown. It ultimately resulted in the colonies gaining independence and the establishment of the United States. The Treaty of Paris in 1783 marked the official end of the war, recognizing American sovereignty and setting a precedent for democratic governance.