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100

This conflict from 1914 to 1918 involved many of the world's great powers and is known for trench warfare and the introduction of tanks and airplanes into combat.

What is World War I?

100

This plan, named after a U.S. Secretary of State, aimed to rebuild European economies after the devastation of World War II.

What is the Marshall Plan?

200

The ideology advocating for a classless society, where the means of production are owned and controlled by the community as a whole.

What is communism?

200

This leader of the Soviet Union was known for his role in World War II and the beginning stages of the Cold War, as well as for his harsh regime that included purges and forced collectivization.

Who is Joseph Stalin?

300

This dictator rose to power in Germany in 1933 and was responsible for starting World War II and the Holocaust.

Who is Adolf Hitler?

300

This term refers to the geopolitical tension after World War II between the Soviet Union and its satellites and the democratic countries of the West, led by the United States.

What is the Cold War?

400

This period, lasting from the late 17th century to the 18th century, emphasized reason, individualism, and skepticism towards traditional institutions.

What is the Enlightenment era?

400

This conflict, lasting from 1939 to 1945, involved most of the world's nations and included significant battles across Europe, as well as the Holocaust and the use of nuclear weapons.

What is World War II?

500

This meeting in 1814-1815 was held to restore European borders and prevent one country from becoming too powerful after the Napoleonic Wars.

What is the Congress of Vienna?

500

This barrier, constructed in 1961, came to symbolize the division between communist East Berlin and democratic West Berlin and, by extension, the division between the Eastern Bloc and the West during the Cold War.

What is the Berlin Wall?

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