-
Henry Ford's mass-produced car, the Model T, revolutionized the automobile industry -
A secret diplomatic communication from Germany to Mexico proposing a military alliance during World War I, which helped lead the U.S. to enter the war. -
The agreement that ended the fighting in World War I, effectively ceasing hostilities and leading to peace talks and the Treaty of Versailles. -
This amendment to the U.S. Constitution granted women the right to vote. -
Lindbergh made the first solo, nonstop transatlantic flight from New York to Paris. -
The day when the stock market crash began, triggering the Great Depression, as panic selling led to massive losses on Wall Street. -
Adolf Hitler was appointed Chancellor of Germany -
A series of government programs and reforms initiated by President Franklin D. Roosevelt to combat the Great Depression. -
An agreement between Germany, the UK, France, and Italy that allowed Hitler to annex Czechoslovakia’s Sudetenland in exchange for promises of no further territorial expansion. -
Germany’s invasion of Poland led to the outbreak of World War II. -
A surprise military strike by Japan on the U.S. naval base at Pearl Harbor. -
The Allied invasion of Normandy, France, which marked the beginning of the liberation of Western Europe from Nazi occupation during World War II. -
The U.S. dropped atomic bombs on these two Japanese cities, leading to Japan’s surrender and the end of World War II. -
The creation of an international organization aimed at promoting peace, security, and cooperation among countries -
A diplomatic cable sent by U.S. diplomat George Kennan from Moscow, outlining the Soviet threat and calling for containment of Soviet expansion -
The North Atlantic Treaty Organization was formed as a military alliance to counter Soviet power during the Cold War. -
The Soviet Union successfully tested its first atomic bomb, signaling the start of the nuclear arms race during the Cold War. -
A conflict between communist North Korea and capitalist South Korea -
A landmark U.S. Supreme Court decision that declared racial segregation in public schools unconstitutional, overturning the "separate but equal" doctrine. -
A conflict between communist North Vietnam, supported by the Soviet Union and China, and South Vietnam, backed by the U.S. -
Rosa Parks' act of defiance on a segregated bus in Montgomery, Alabama, sparked the Civil Rights Movement. -
A tense 13-day standoff between the U.S. and the Soviet Union over the presence of Soviet nuclear missiles in Cuba, bringing the two superpowers to the brink of nuclear war. -
U.S. President John F. Kennedy was assassinated in Dallas, Texas, shaking the nation and leading to Lyndon B. Johnson's presidency. -
U.S. Congress passed a resolution that gave President Lyndon B. Johnson the authority to escalate U.S. military involvement in Vietnam -
American astronauts Neil Armstrong and Buzz Aldrin became the first humans to walk on the Moon -
A break-in at the Democratic National Committee headquarters led to a cover-up that ultimately resulted in President Nixon's resignation -
President Richard Nixon resigned after the Watergate scandal, becoming the first U.S. president to do so, to avoid impeachment. -
The collapse of the Berlin Wall symbolized the end of the Cold War and led to the reunification of Germany. -
The development of the Internet began in the 1980s, with the creation of ARPANET and its eventual transition into a public, global network in the early 1990s. -
Coordinated terrorist attacks by the Islamic extremist group al-Qaeda on the U.S. led to the collapse of the World Trade Center towers and massive loss of life -
A global pandemic caused by the SARS-CoV-2 virus began in Wuhan, China, and spread worldwide, causing widespread illness, death, and economic disruption.