 In other words, the PAVN/VC would have to fight on for as long as possible, until the United States recognized that the war was unwinnable and would disengage from the conflict in Vietnam.To achieve that objective at the tactical level, Tra argued that PAVN and VC forces would have to destroy American military units, and cause as many casualties as possible until they got tired and left.Indeed, towards mid-1967 General Thanh, who had the VC 7th and 9th Division at his disposal, was out to do just that.