This Day In History: March 20

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Retired U.S. Marine Corps Commandant Gen. David Shoup estimates that up to 800,000 men would be required just to defend South Vietnamese population centers. He further stated that the United States could only achieve military victory by invading the North, but argued that such an operation would not be worth the cost.

Also on this day: The New York Times publishes excerpts from General Westmoreland’s classified end-of-year report, which indicated that the U.S. command did not believe the enemy capable of any action even approximating the Tet Offensive. This report, Shoup’s comments, and other conflicting assessments of the situation in Vietnam contributed to the growing dissatisfaction among a large segment of American society with the Vietnam War. At the end of the previous year, Johnson administration officials had insisted that the United States had turned a corner in the war. The strength and scope of the Tet Offensive flew in the face of these claims, feeding a widening credibility gap. Despite administration assurances that the situation was getting better in Vietnam, the North Vietnamese and Viet Cong had launched a massive attack at 3:00 A.M. on January 31, 1968, simultaneously hitting Saigon, Da Nang, Hue, and other major cities, towns, and military bases throughout South Vietnam. One assault team got within the walls of the U.S. Embassy in Saigon before they were destroyed. In the end, the communist forces were resoundingly defeated, but the United States suffered a fatal strategic blow. The Tet Offensive cost the government the confidence of the American people and public opinion turned against the war.