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War 16 January-28 February 1991 between Iraq and a coalition of 28 nations led by the USA; The invasion and annexation of Kuwait by Iraq on 2 August 1990 provoked a build-up of US troops in Saudi Arabia, eventually totalling over 500,000.
The severe economic crisis supposedly precipitated by the U.S. stock-market crash of 1929; Although it shared the basic characteristics of other such crises (see depression), the Great Depression was unprecedented in its length and in the wholesale poverty and tragedy it inflicted on society.
War from 1954 to 1975 between communist North Vietnam and US-backed South Vietnam, in which North Vietnam aimed to conquer South Vietnam and unite the country as a communist state. North Vietnam was supported by communist rebels from South Vietnam, the Vietcong.
War between the Central European Powers (Germany, Austria-Hungary, and allies) on one side and the Triple Entente (Britain and the British Empire, France, and Russia) and their allies, including the USA (which entered in 1917), on the other side.
Government study of U.S. involvement in Southeast Asia. Commissioned by Secretary of Defense Robert S. McNamara in June, 1967, the 47-volume, top secret study covered the period from World War II to May, 1968.
Events following the seizure of the American embassy in Tehran by Iranian students on Nov. 4, 1979; The overthrow of Muhammad Reza Shah Pahlevi of Iran by an Islamic revolutionary government earlier in the year had led to a steady deterioration in Iran-U.S. relations.
Secret arrangement in the 1980s to provide funds to the Nicaraguan contra rebels from profits gained by selling arms to Iran; The Iran-contra affair was the product of two separate initiatives during the administration of President Ronald Reagan.
Demonstrations, marches, and acts of civil disobedience in protest to US involvement in the Vietnam War (1954–75), beginning around 1965. Anti-war sentiment arose from the question of the morality of participation in what many regarded as a civil war; the growing human and environmental costs; and doubts that the US war effort would succeed
US movement especially active during the 1950s and 60s that aimed to end segregation and discrimination against blacks, as well as affirm their constitutional rights and improve their status in society.
Statutory limitations placed on the number of terms officeholders may serve; Focusing especially on members of the U.S. Congress, term limits became an important national political issue during the late 1980s and early 90s and have been vigorously debated.