The 1973 cease-fire agreement in Vietnam signaled the end of the American advisory effort in that country. The senior officials of DAO scrupulously avoided any offer of operational advice to the Vietnamese with whom they worked intimately and continuously. The technical assistance provided by the military and senior civilian officials of DAO and by the contractors was essential to the RVNAF's modernization and expansion, but the South Vietnamese military would get no advice on military operations, tactics, or techniques of employment.
The war belonged to the Vietnamese, and they were going to fight it. The RVNAF knew what to do but had to be provided the means. What they could not control was the steady buildup of North Vietnamese military power within their borders, a buildup which culminated in the final offensive of 1975