1950–1999

 
1950–1953Korean War: Cold war conflict between Communist and non-Communist forces on Korean Peninsula. North Korean communists invade South Korea (June 25, 1950). President Truman, without the approval of Congress, commits American troops to battle (June 27). President Truman removes Gen. Douglas MacArthur as head of U.S. Far East Command (April 11, 1951). Armistice agreement is signed (July 27, 1953). 
1950–1975Vietnam War: Prolonged conflict between Communist forces of North Vietnam, backed by China and the USSR, and non-Communist forces of South Vietnam, backed by the United States. President Truman authorizes $15 million in economic and military aid to the French, who are fighting to retain control of French Indochina, including Vietnam. As part of the aid package, Truman also sends 35 military advisers (May 1950). North Vietnamese torpedo boats allegedly attack U.S. destroyer in Gulf of Tonkin off the coast of North Vietnam (Aug. 2, 1964). Congress approves Gulf of Tonkin resolution, authorizing President Johnson to take any measures necessary to defend U.S. forces and prevent further aggression (Aug. 7). U.S. planes begin bombing raids of North Vietnam (Feb. 1965). First U.S. combat troops arrive in South Vietnam (March 8–9). North Vietnamese army and Viet Cong launch Tet Offensive, attacking Saigon and other key cities in South Vietnam (Jan.–Feb. 1968). American soldiers kill 300 Vietnamese villagers in My Lai massacre (March 16). U.S. troops invade Cambodia (May 1, 1970). Representatives of North and South Vietnam, the Viet Cong, and the U.S. sign a cease-fire agreement in Paris (Jan. 27, 1973). Last U.S. troops leave Vietnam (March 29). South Vietnamese government surrenders to North Vietnam; U.S. embassy Marine guards and last U.S. civilians are evacuated (April 30, 1975).  
1951Twenty-Second Amendment to the Constitution is ratified, limiting the president to two terms (Feb. 27). President Truman speaks in first coast-to-coast live television broadcast (Sept. 4). 
1952Puerto Rico becomes a U.S. commonwealth (July 25). First hydrogen bomb is detonated by the U.S. on Eniwetok, an atoll in the Marshall Islands (Nov. 1). 
1953Dwight Eisenhower is inaugurated as the 34th president (Jan. 20). Julius and Ethel Rosenberg are executed for passing secret information about U.S. atomic weaponry to the Soviets (June 19).
Dwight D. Eisenhower
Dwight D. Eisenhower
1954Sen. Joseph R. McCarthy accuses army officials, members of the media, and other public figures of being Communists during highly publicized hearings (April 22–June 17). Brown v. Board of Education of Topeka, Kans.: Landmark Supreme Court decision declares that racial segregation in schools is unconstitutional (May 17). 
1957Eisenhower's second inauguration (Jan. 21). President sends federal troops to Central High School in Little Rock, Ark., to enforce integration of black students (Sept. 24).  
1958Explorer I, first American satellite, is launched (Jan. 31).
Explorer 1
Explorer I
1959Alaska becomes the 49th state (Jan. 3) and Hawaii becomes the 50th (Aug. 21). 
1961U.S. severs diplomatic relations with Cuba (Jan. 3). John F. Kennedy is inaugurated as the 35th president (Jan. 20). Bay of Pigs invasion of Cuba fails (April 17–20). A mixed-race group of volunteers sponsored by the Committee on Racial Equality—the so-called Freedom Riders—travel on buses through the South in order to protest racially segregated interstate bus facilities (May).  
1962Lt. Col. John Glenn becomes first U.S. astronaut to orbit Earth (Feb. 20). Cuban Missile Crisis: President Kennedy denounces Soviet Union for secretly installing missile bases on Cuba and initiates a naval blockade of the island (Oct. 22–Nov. 20).  
1963Rev. Martin Luther King, Jr., delivers his “I Have a Dream” speech before a crowd of 200,000 during the civil rights march on Washington, DC (Aug. 28). President Kennedy is assassinated in Dallas, Tex. (Nov. 22). He is succeeded in office by his vice president, Lyndon B. Johnson.
John F. Kennedy
John F. Kennedy
1964President Johnson signs the Civil Rights Act (July 2). 
1965In his annual state of the Union address, President Johnson proposes his Great Society program (Jan. 4). L. Johnson's second inauguration (Jan. 20). State troopers attack peaceful demonstrators led by Rev. Martin Luther King, Jr., as they try to cross bridge in Selma, Ala. (March 7). President Johnson signs the Voting Rights Act, which prohibits discriminatory voting practices (Aug. 6). In six days of rioting in Watts, a black section of Los Angeles, 35 people are killed and 883 injured (Aug. 11–16). 
1966Miranda v. Arizona: Landmark Supreme Court decision further defines due process clause of Fourteenth Amendment and establishes Miranda rights (June 13). 
1967Twenty-Fifth Amendment to the Constitution is ratified, outlining the procedures for filling vacancies in the presidency and vice presidency (Feb. 10). 
1968Rev. Martin Luther King, Jr., is assassinated in Memphis, Tenn. (April 4). Sen. Robert F. Kennedy is assassinated in Los Angeles, Calif. (June 5–6).
Martin Luther King and Robert F. Kennedy
Martin Luther King and Robert F. Kennedy
1969Richard Nixon is inaugurated as the 37th president (Jan. 20). Astronauts Neil Armstrong and Edwin Aldrin, Jr., become the first men to land on the Moon (July 20).  
1970Four students are shot to death by National Guardsmen during an antiwar protest at Kent State University (May 1).  
1971The Twenty-Sixth Amendment to the Constitution is ratified, lowering the voting age from 21 to 18 (July 1). 
1972Nixon makes historic visit to Communist China (Feb. 21–27). U.S. and Soviet Union sign strategic arms control agreement known as SALT I (May 26). Five men, all employees of Nixon's reelection campaign, are caught breaking into rival Democratic headquarters at the Watergate complex in Washington, DC (June 17).
Richard M. Nixon
Richard M. Nixon
1973Nixon's second inauguration (Jan. 20). Roe v. Wade: Landmark Supreme Court decision legalizes abortion in first trimester of pregnancy (Jan. 22). Senate Select Committee begins televised hearings to investigate Watergate cover-up (May 17–Aug. 7). Vice President Spiro T. Agnew resigns over charges of corruption and income tax evasion (Oct. 10). President Nixon nominates Gerald R. Ford as vice president (Oct. 12). Ford is confirmed by Congress and sworn in (Dec. 6). He is the first vice president to succeed to the office under the terms laid out by the Twenty-Fifth Amendment. 
1974House Judiciary Committee recommends to full House that Nixon be impeached on grounds of obstruction of justice, abuse of power, and contempt of Congress (July 27–30). Nixon resigns; he is succeeded in office by his vice president, Gerald Ford (Aug. 9). Nixon is granted an unconditional pardon by President Ford (Sept. 8). Five former Nixon aides go on trial for their involvement in the Watergate cover-up (Oct. 15); H. R. Haldeman, John D. Ehrlichman, and John Mitchell eventually serve time in prison. Nelson Rockefeller is confirmed and sworn in as vice president (Dec. 19). 
1977Jimmy Carter is inaugurated as the 39th president (Jan. 20). President Carter signs treaty (Sept. 7) agreeing to turn control of Panama Canal over to Panama on Dec. 31, 1999.
Jimmy Carter
Jimmy Carter
1978President Carter meets with Egyptian president Anwar Sadat and Israeli prime minister Menachem Begin at Camp David (Sept. 6); Sadat and Begin sign Camp David Accord, ending 30-year conflict between Egypt and Israel (Sept. 17). 
1979U.S. establishes diplomatic ties with mainland China for the first time since Communist takeover in 1949 (Jan. 1). Malfunction at Three Mile Island nuclear reactor in Pennsylvania causes near meltdown (March 28). Panama takes control of the Canal Zone, formerly administered by U.S. (Oct. 1). Iranian students storm U.S. embassy in Teheran and hold 66 people hostage (Nov. 4); 13 of the hostages are released (Nov. 19–20).
3 Mile Island
Three Mile Island
1980President Carter announces that U.S. athletes will not attend Summer Olympics in Moscow unless Soviet Union withdraws from Afghanistan (Jan. 20). FBI's undercover bribery investigation, code named Abscam, implicates a U.S. senator, seven members of the House, and 31 other public officials (Feb. 2). U.S. mission to rescue hostages in Iran is aborted after a helicopter and cargo plane collide at the staging site in a remote part of Iran and 8 servicemen are killed (April 25).  
1981Ronald Reagan is inaugurated as the 40th president (Jan. 20). U.S. hostages held in Iran are released after 444 days in captivity (Jan. 20). President Reagan is shot in the chest by John Hinckley, Jr. (March 30). Sandra Day O'Connor is sworn in as the first woman Supreme Court justice (Sept. 25).
Sandra Day O'Connor
Sandra Day O'Connor
1982Deadline for ratification of the Equal Rights Amendment to the Constitution passes without the necessary votes (June 30). 
1983U.S. invades Caribbean island of Grenada after a coup by Marxist faction in the government (Oct. 25). 
1985Reagan's second inauguration (Jan. 21).  
1986Space shuttle Challenger explodes 73 seconds after liftoff, killing all seven crew members (Jan. 28). It is the worst accident in the history of the U.S. space program. U.S. bombs military bases in Libya in effort to deter terrorist strikes on American targets (April 14). Iran-Contra scandal breaks when White House is forced to reveal secret arms-for-hostages deals (Nov.).
Challenger
Challenger
1987Congress holds public hearings in Iran-Contra investigation (May 5–Aug. 3). In a speech in Berlin, President Reagan challenges Soviet leader Mikhail Gorbachev to “tear down this wall” and open Eastern Europe to political and economic reform (June 12). Reagan and Gorbachev sign INF treaty, the first arms-control agreement to reduce the superpowers' nuclear weapons (Dec. 8).  
1989George H. W. Bush is inaugurated as the 41st president (Jan. 20). Oil tanker Exxon Valdez runs aground in Prince William Sound, spilling more than 10 million gallons of oil (March 24). It is the largest oil spill in U.S. history. President Bush signs legislation to provide for federal bailout of nearly 800 insolvent savings and loan institutions (Aug. 9). U.S. forces invade Panama in an attempt to capture Gen. Manuel Noriega, who previously had been indicted in the U.S. on drug trafficking charges (Dec. 20). 
1990Iraqi troops invade Kuwait, leading to the Persian Gulf War (Aug. 2). 
1991Persian Gulf War: U.S. leads international coalition in military operation (code named “Desert Storm”) to drive Iraqis out of Kuwait (Jan. 16–Feb. 28). Iraq accepts terms of UN ceasefire, marking an end of the war (April 6).  
1991U.S. and Soviet Union sign START I treaty, agreeing to further reduce strategic nuclear arms (July 31). Senate Judiciary Committee conducts televised hearings to investigate allegations of past sexual harassment brought against Supreme Court nominee Clarence Thomas by Anita Hill, a law professor at the University of Oklahoma (Oct. 11–13). 
1992Following the breakup of the Soviet Union in Dec. 1991, President Bush and Russian president Boris Yeltsin meet at Camp David and formally declare an end to the cold war (Feb. 1). The acquittal of four white police officers charged in the 1991 beating of black motorist Rodney King in Los Angeles sets off several days of rioting, leading to more than 50 deaths, thousands of injuries and arrests, and $1 billion in property damage (April 29). President Bush authorizes sending U.S. troops to Somalia as part of UN relief effort (Dec. 4). President Bush grants pardons to six officials convicted or indicted in the Iran-Contra scandal, leading some to suspect a cover-up (Dec. 24).
Boris Yeltsin and George Bush
Boris Yeltsin and George Bush
1993Bill Clinton is inaugurated as the 42nd president (Jan. 20). Bomb explodes in basement garage of World Trade Center, killing 6, injuring 1,000, and causing more than $500 million in damage (Feb. 26). After 51-day standoff with federal agents, Branch Davidian compound in Waco, Tex., burns to the ground, killing 80 cult members (April 19). President Clinton orders missile attack against Iraq in retaliation for alleged plot to assassinate former President Bush (June 26). Eighteen U.S. soldiers are killed in ambush by Somali militiamen in Mogadishu (Oct. 3–4). President Clinton signs North American Free Trade Agreement into law (Dec. 8).
William J. Clinton
William J. Clinton
1994Paula Jones, a former Arkansas state employee, files a federal lawsuit against President Clinton for sexual harassment (May 6).  
1995Bombing of federal office building in Oklahoma City kills 168 people (April 19). U.S. establishes full diplomatic relations with Vietnam (July 11). President Clinton sends first 8,000 of 20,000 U.S. troops to Bosnia for 12-month peacekeeping mission (Dec.). Budget standoff between President Clinton and Congress results in partial shutdown of U.S. government (Dec. 16–Jan. 6). 
1997Clinton's second inauguration (Jan. 20). 
1998President Clinton denies having had a sexual relationship with a White House intern named Monica Lewinsky (Jan. 17). President Clinton releases 1999 federal budget plan; it is the first balanced budget since 1969 (Feb. 2). In televised address, President Clinton admits having had a sexual relationship with Monica Lewinsky (Aug. 17). U.S. launches missile attacks on targets in Sudan and Afghanistan following terrorist attacks on U.S. embassies in Kenya and Tanzania (Aug. 20). U.S. and Britain launch air strikes against weapons sites in Iraq (Dec. 16). House of Representatives votes to impeach President Clinton on charges of perjury and obstruction of justice (Dec. 19). 
1999Senate acquits Clinton of impeachment charges (Feb. 12). NATO wages air campaign against Yugoslavia over killing and deportation of ethnic Albanians in Kosovo (March 24–June 10). School shooting at Columbine High School in Littleton, Colo., leaves 14 students (including the 2 shooters) and 1 teacher dead and 23 others wounded (April 20). U.S. and China sign historic trade agreement (Nov. 15).  

1900–1949U.S. History Timeline2000–