Reagan was quoted after his presidency that his major regret was having posted the Marines to the Beirut barracks which were out in the open and targeted by bombers that killed 240. This was a harebrained neocon idea that was foisted on Reagan and he never repeated anything like it. I really doubt he would have gone along with the Iraq craziness or the deep involvement in places like Syria, Jordan and Yemen - Bush Jr. neocon madness at its worst.
Didn’t Bush convince him to do that?