My Dad was about that age when he went into the Army in WWII. Ended up flying B-17s from England.
My son is that age now, and I am trying to get him to reconsider the Marines. He has a program in mind, intelligence MOS, looks perfect for him. He was primed to go through the fast-track OCS last spring, but living with his pacifist ultra-lib brainless Mom (ex wife, thank you very much) softened his resolve. I now have him back to seriously considering it for next May, only offered once a year. Keep you fingers crossed for him, and your prayers moving to Heaven.