Viking exploration -- Columbus -- British exploration -- Puritans -- French and Indian War -- Government in colonial America -- The American revolution -- The War of 1812 -- The Monroe Doctrine -- Manifest destiny -- Texas and the Mexican-American Wars -- Slavery -- The Civil War -- Immigration -- Opening of Japan -- The Spanish-American War -- Philippine-American War -- Boxer Rebellion -- U.S. interventions in Latin America and the Caribbean -- Causes of World War I -- The Great War -- Aftermath of the war -- Invasion of Russia -- The Treaty of Versailles -- The Great Depression -- World War II -- D-Day and the liberation of Europe -- Resistance -- World War II : Pacific theater -- The atomic bomb -- The origins of the Cold War -- The United Nations -- The Cuban revolution -- Korean War -- NATO -- McCarthyism -- Suez Canal -- The Cuban missile crisis -- The Pueblo incident -- The Vietnam War -- The end of the Cold War -- The hostage crisis in Iran -- Nicaragua in the 1980s -- Apartheid -- Free trade -- U.S.-Philippine relations -- Cuban-American relations -- The Middle East -- Nuclear weapons in North Korea -- A new world order