The American Revolutionary War was a conflict between the thirteen American colonies and Great Britain from 1775 to 1783. The war began due to growing tensions over British taxation and lack of representation in Parliament. Key events included the Boston Tea Party and the battles of Lexington and Concord. The war resulted in the colonies gaining independence and the formation of the United States of America. The conflict was officially concluded with the signing of the Treaty of Paris in 1783, which recognized American sovereignty and established borders for the new nation.