During the Vietnam War, Theodore Shackley and Donald Gregg were running a CIA racket in which the proceeds of opium-smuggling funded assassinations. In 1970, Felix Rodriguez joined them. This was the heart of the later “Enterprise.”

It was Shackley who allegedly formed the Military Assistance Group-Special Operations Group (MAG-SOG), where John K. Singlaub was a commander and Oliver North and Richard Secord were officers. By 1971, the group is said to have killed about 100,000 civilians in Southeast Asia.