How many living recruits have been trained by the Secret Space Program and are available to be recalled for duty as a mercenary army to be used against humanity?

Among living humans, the figure is well over 1 million. So you can see this comprises a considerable force. When staffing advanced craft and weapons, they would be quite a force to reckon with, and when under strict mind control are capable of anything, including destruction of human cities and the wholesale slaughter of millions of people.