February 22, 1965 - General Westmoreland requests two battalions of U.S. Marines to protect the American air base at Da Nang from 6000 Viet Cong massed in the vicinity.

April 20, 1965 - In Honolulu, Johnson's top aides, including McNamara, Gen. Westmoreland, Gen. Wheeler, William Bundy, and Ambassador Taylor, meet and agree to recommend to the President sending another 40,000 combat soldiers to Vietnam.

July 28, 1965 - During a noontime press conference, President Johnson announces he will send 44 combat battalions to Vietnam increasing the U.S. military presence to 125,000 men. Monthly draft calls are doubled to 35,000. "I have asked the commanding general, General Westmoreland, what more he needs to meet this mounting aggression. He has told me. And we will meet his needs. We cannot be defeated by force of arms. We will stand in Vietnam."

April 24, 1967 - General Westmoreland condemns anti-war demonstrators saying they give the North Vietnamese soldier "hope that he can win politically that which he cannot accomplish militarily." Privately, he has already warned President Johnson "the war could go on indefinitely."

July 1967 - General Westmoreland requests an additional 200,000 reinforcements on top of the 475,000 soldiers already scheduled to be sent to Vietnam, which would bring the U.S. total in Vietnam to 675,000. President Johnson agrees only to an extra 45,000.

November 17, 1967 - Following an optimistic briefing in the White House by General Westmoreland, Ambassador Bunker, and Robert Komer, President Johnson tells the American public on TV, "We are inflicting greater losses than we're taking...We are making progress." In a Time magazine interview, General Westmoreland taunts the Viet Cong, saying "I hope they try something because we are looking for a fight."

February 28, 1968 - Joint Chiefs Chairman Gen. Wheeler, at the behest of Gen. Westmoreland, asks President Johnson for an additional 206,000 soldiers and mobilization of reserve units in the U.S.

March 23, 1968 - During a secret meeting in the Philippines, Gen Wheeler informs Gen. Westmoreland that President Johnson will approve only 13,500 additional soldiers out of the original 206,000 requested. Gen. Wheeler also instructs Westmoreland to urge the South Vietnamese to expand their own war effort. By year's end (1968), U.S. troop levels reached 495,000 with 30,000 American deaths to date. In 1968, over a thousand a month were killed.

July 1, 1968 - General Westmoreland is replaced as U.S. commander in Vietnam by General Creighton W. Abrams. Westmoreland is "kicked upstairs" becoming Army Chief of Staff.

http://www.presidency.ucsb.edu/vietnam/timeline.php.