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The introduction of Ford’s mass-produced automobile, which revolutionized transportation.
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A secret diplomatic communication from Germany to Mexico proposing an alliance during World War I, which contributed to the U.S. entering the war.
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The agreement that ended fighting on the Western Front in World War I, marking the end of the war.
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This amendment granted women the right to vote in the United States.
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The first solo nonstop transatlantic flight by Charles Lindbergh from New York to Paris.
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The stock market crash that marked the beginning of the Great Depression.
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A series of programs and reforms introduced by Franklin D. Roosevelt to counter the effects of the Great Depression.
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Adolf Hitler was appointed Chancellor of Germany, beginning his rise to totalitarian power.
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The German invasion of Poland triggered the start of World War II.
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An agreement allowing Nazi Germany to annex parts of Czechoslovakia, which failed to prevent World War II.
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A surprise Japanese attack on the U.S. naval base at Pearl Harbor, leading to America’s entry into World War II.
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The Allied invasion of Normandy, France, which was a turning point in World War II.
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The U.S. dropped atomic bombs on these two Japanese cities, leading to Japan’s surrender in World War II.
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The U.S. dropped atomic bombs on these two Japanese cities, leading to Japan’s surrender in World War II.
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The creation of an international organization aimed at maintaining peace and promoting cooperation among nations.
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A diplomatic cable from U.S. diplomat George Kennan outlining the Soviet threat and the policy of containment.
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The North Atlantic Treaty Organization, a military alliance formed for mutual defense against Soviet aggression.
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The Soviet Union successfully tested its first nuclear bomb, ending the U.S. atomic monopoly.
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A war between North and South Korea, with the U.S. and China supporting opposite sides.
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The Supreme Court case that declared racial segregation in public schools unconstitutional.
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A conflict between communist North Vietnam and non-communist South Vietnam, with U.S. military involvement.
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Rosa Parks’ arrest for refusing to vacate her seat on a segregated bus sparked the Civil Rights Movement.
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A tense 13-day standoff between the U.S. and the Soviet Union over the presence of Soviet missiles in Cuba.
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President John F. Kennedy was assassinated in Dallas, Texas.
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A U.S. Congressional resolution that escalated American involvement in the Vietnam War.
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The first successful manned mission to land on the Moon, with Neil Armstrong and Buzz Aldrin walking on its surface.
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The burglary of the Democratic National Committee headquarters, leading to the Watergate scandal and President Nixon’s resignation.
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President Richard Nixon resigned due to the Watergate scandal, becoming the first U.S. president to do so.
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The World Wide Web was made publicly available, revolutionizing communication and information sharing.
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The demolition of the Berlin Wall, symbolizing the end of the Cold War and the reunification of East and West Germany.
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Terrorist attacks by al-Qaeda on U.S. soil, resulting in massive loss of life and leading to global counterterrorism efforts.
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The World Health Organization declared the global outbreak of COVID-19 a pandemic, which affected nearly every country in the world.