Revolutionary War: A war fought between Great Britain and its thirteen American colonies from 1775 to 1783. The colonies sought independence from British rule and eventually established the United States.
Civil War: A war fought within a single country between different factions or regions. In the context of American history, it refers to the conflict between the Northern states (Union) and Southern states (Confederacy) from 1861 to 1865.
World War II: A global war that lasted from 1939 to 1945 involving many countries around the world. It was primarily fought between two major alliances: the Allies (including the United States) and the Axis powers (led by Germany, Italy, and Japan).