| Trade embargo imposed on North Vietnam in response to attacks from the North on South Vietnam |
May 4, 1964 |
***** |
| General William Westmoreland succeeds General Paul Harkins as head of the U.S. forces (MACV) in Vietnam |
June 20, 1964 |
***** |
| The Gulf of Tonkin Incident |
August 2, 1964 |
North Vietnamese torpedo boats attacked the U.S. destroyer Maddox in the Gulf of Tonkin. A second attack allegedly occurs on August 4. |
| The "Second" Gulf of Tonkin Incident |
August 4, 1964 |
North Vietnamese torpedo boat attack (alleged). North Vietnamese torpedo boats attacked the U.S. destroyer Maddox in the Gulf of Tonkin. A second attack allegedly occurs on August 4. |
| President Lyndon Johnson asks Congress for a resolution against North Vietnam |
August 5, 1964 |
President Lyndon Johnson asks Congress for a resolution against North Vietnam following the Gulf of Tonkin incident - Congress debates. |
| Congress approves the Gulf of Tonkin Resolution |
August 7, 1964 |
Congress approves the Gulf of Tonkin Resolution which allows the president to take any necessary measures to repel further attacks and to provide military assistance to any South Asia Treaty Organization (SEATO) member. |
| The first American combat troops arrive in Vietnam |
March 8-9, 1965 |
***** |
| President Johnson authorizes the use of U.S. ground combat troops for offensive operations |
April 6-8, 1965 |
***** |
| Siege of Khe Sanh begins |
January 21, 1968 |
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| Tet Offensive |
January 31, 1968 |
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| My Lai massacre |
March 16, 1968 |
Unarmed Vietnamese civilians are killed by members of U.S. Army Lt. William L. Calley Jr.'s platoon. |
| President Lyndon Johnson names General William Westmoreland as Army Chief of Staff |
March 22, 1968 |
He was replaced in Vietnam by General Creighton W. Abrams |
| Paris peace talks begin between U. S. and Vietnamese officials |
May 10, 1968 |
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| Hamburger Hill |
May 10-20, 1969 |
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| President Richard Nixon announces the first troop withdrawals from South Vietnam |
June 8, 1969 |
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| Ho Chi Minh dies |
September 3, 1969 |
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| 250,000 people demonstrate against the war in Washington, D.C. |
November 15, 1969 |
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| The first draft lottery since 1942 begins |
December 1, 1969 |
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