TIL of Paul Douglas, who earned a PHD from Columbia, became a Chicago city councilman and then joined the Marines as a private in 1942 at age 50. He saw combat, waswounded and later became a Senator from Illinois

https://en.wikipedia.org/wiki/Paul_Douglas

https://www.reddit.com/r/todayilearned/comments/150tt4a/til_of_paul_douglas_who_earned_a_phd_from/