This document contains a list of over 50 important terms from American history ranging from the late 19th century to the mid 20th century, including political movements, government policies and programs, wars and battles, social trends, and landmark laws and court cases. Some of the more notable entries include the Homestead Act, Populist Party, Treaty of Versailles, 19th Amendment, New Deal, Manhattan Project, Korean War, Brown v. Board of Education, and Cold War events like the Berlin Airlift and Bay of Pigs Invasion.