I suspect he is also trying to draw everyone's attention from the area of greatest threat, the northern part of I Corps. Let me caution everyone not to be confused." In the end, a major allied relief expedition (Operation Pegasus) launched by all three brigades of the 1st Cavalry Division reached Khe Sanh on 8 April, but PAVN forces were already withdrawing from the area. Both sides claimed that the battle had served its intended purpose. MACV estimated that 5,500 PAVN troops had been killed and considerably more wounded. During the entire battle from 1 November 1967 to 14 April 1968, 730 U.S. personnel were killed and another 2,642 wounded. Khe Sanh Base was later closed on 5 July 1968 because the base was seen as having less of a strategic importance than before. Except at Huế and mopping-up operations in and around Saigon, the first surge of the offensive was over by the second week of February. The U.S. estimated that during the first phase (30 January – 8 April) approximately 45,000 PAVN/VC soldiers were killed and an unknown number were wounded. For years this figure has been held as excessively optimistic, as it represented more than half the forces involved in this battle. Stanley Karnow claims he confirmed this figure in Hanoi in 1981. Westmoreland himself claimed a smaller number of enemies disabled, estimating that during the same period 32,000 PAVN troops were killed and another 5,800 captured. The South Vietnamese suffered 2,788 killed, 8,299 wounded, and 587 missing in action. U.S. and other allied forces suffered 1,536 killed, 7,764 wounded, and 11 missing. The leadership in Hanoi was despondent at the outcome of their offensive. Their first and most ambitious goal, producing a general uprising, had ended in a dismal failure. In total, about 85,000–100,000 PAVN/VC troops had participated in the initial onslaught and in the follow-up phases. Overall, during the "Border Battles" of 1967 and the nine-month winter-spring campaign, 45,267 PAVN/VC troops had been killed in action. Hanoi had underestimated the strategic mobility of the allied forces, which allowed them to redeploy at will to threatened areas; their battle plan was too complex and difficult to coordinate, which was amply demonstrated by the 30 January attacks; their violation of the principle of mass, attacking everywhere instead of concentrating their forces on a few specific targets, allowed their forces to be defeated piecemeal; the launching of massed attacks headlong into the teeth of vastly superior firepower; and last, but not least, the incorrect assumptions upon which the entire campaign was based.