I read the book by Pillar [his widow] and she stated that he wanted to but the Studio would not let him go, because of the money that he was bringing in. The head of the studio yelled at him that if he did enlist that they would sue him into bankrupcy, and with 1 girlfriend/wife, 2 ex-wives & 4 kids to support & not to enclude all of the extended family that he supported, that was a very real threat.
So during that time he became a super Patriot, there was also a story that he had worked with the old OSS, John Wayne had even stated that he had done some things for them while working overseas, but never stated just what they were.
I suspect a lot of folks in the spot lite actually use that spot-lite as an almost perfect cover for their more “clandestine spook works”. I read that Gene Berry of the “Gong Show” was a self admitted spook but he never really spoke of what he did as a field operative!