What is combat in which each side occupies a system of protective trenches?
100
John F. Kennedy
What is the 35th president of the United States and the youngest man elected to office?
100
Angel Island
What is an immigration station where immigrants entering the United States were detained and interrogated (located in San Francisco Bay, California)?
100
Cold War
What is a constant nonviolent state of hostility between the Soviet Union and the United States that took place shortly after World War 2?
100
Lusitania
What is a British luxury liner sunk by a German submarine in the North Atlantic on May 7, 1915?
200
Glasnost
What is the declared public policy within the Soviet Union of openly and frankly discussing economic and political realities: initiated under Mikhail Gorbachev in 1985?
200
Fidel Castro
What is Cuban socialist leader who overthrew a dictator in 1959 and established a Marxist socialist state in Cuba?
200
Ellis Island
What is in the harbor of New York City, southwest of Manhattan and served as the prime immigration station of the country?
200
Korean War
What is a war fought in the early 1950s between the United Nations, supported by the United States, and the communist Democratic People's Republic of Korea (North Korea) that began in 1950, when North Korea invaded South Korea?
200
Reservation System
What is a system devised to encourage the Indians to live within clearly defined zones, in exchange the U.S. promised to provide food, goods and money and to protect them from attack by other tribes and white settlers?
300
Carpetbagger
What is a person from the northern United States who went to the South after the American Civil War to make money?
300
Charles Sumner
What is a U.S. Senator from Massachusetts (1851-74) who was active before and after the Civil War in the movement to abolish slavery and give equal rights to black Americans ?
300
Panama Canal
What is the waterway across the Isthmus of Panama, connects the Atlantic Ocean and the Pacific Ocean, and the United States built it from 1904 to 1914?
300
Vietnam War
What is a Cold War conflict pitting the U.S. and the remnants of the French colonial government in South Vietnam against the indigenous but communist Vietnamese independence movement?
300
Holocaust
What is the killing of millions of Jews and other people by the Nazis during World War II?
400
Sharecropping
What is a system of agriculture in which a landowner allows a tenant to use the land in return for a share of the crops produced on their portion of land?
400
Henry Flagler
What is a self-made millionaire and industrialist who co-founded the Standard Oil Company?
400
Hiroshima
What is a city of southwest Honshu, Japan, on the Inland Sea west of Osaka and was destroyed in World War II when an American airplane dropped the first atomic bomb ever used in warfare (August 6, 1945)?
400
Spanish-American War
What is a war in 1898 between the US and Spain, which the US started because it wanted Cuba to be independent from Spain and because the US battleship Maine was mysteriously destroyed by an explosion near Havana, Cuba?
400
Jazz Age
What is a period in the 1920s, ending with the Great Depression, in which jazz music and dance styles became popular, mainly in the United States, but also in Britain, France and elsewhere?
500
Imperialism
What is a policy of extending a country's power and influence through diplomacy or military force?
500
Thaddeus Stevens
What is a member of the United States House of Representatives from Pennsylvania and one of the leaders of the Radical Republican faction of the Republican Party during the 1860s?
500
Nagasaki
What is a city of western Kyushu, Japan, on Nagasaki Bay, an inlet of the East China Sea, the first Japanese port to be opened to foreign trade in the 1500s, and hit by the second atomic bomb used in World War II (August 9, 1945)?
500
Fourteen Points
What is fourteen goals of the United States in the peace negotiations after World War I?