 Once the MACV-SOG took control, the Pentagon (under which MACV-SOG operated) issued an Operational Plan (OPLAN 34-63), which entailed commando raids of a similar sort to what had been happening under the CIA.Most of these raids tended to be unsuccessful, with the Republic of Vietnam (RVN or South Vietnam) commandos usually being captured or killed (the actual commandos themselves were always people of South Vietnam ethnicities, so as to maintain the deniability of the American involvement in the operation).A U.S. Navy base was set up in Da Nang, to serve as a base for the operations, and was staffed with U.S. Navy SEALs, U.S. Marine intelligence officers, and other guerrilla warfare specialists.