FSSF 2-1 Looking for my father. please help me. In Rangers too 4-B . Charlie A Brown

Hello, My name is Trudy Brown Jackson. I come from Chelsea, Gardiner, Maine. My father, Charlie A Brown died very young.
I knew he was in special service but no one ever talked about it. I didn't grown up with my dad, and he died young, April 5, 1969.
His service number is 31 322-071. Enlistment date-April 27, 1924.
It says on some papers he was a Forceman in the 1st. Regiment 2nd Company of the FSSF.
Also, it says on his Appl. for a headstone --Army Ranger , 16th Major Port.
He was also one of Darby's Rangers.
I'm looking for all or any information on him. I would love to find a picture or pictures of him. Or if anyone knew him?
Thanks so much,
Trudy Brown Jackson