After having enlisted at 17 and out at 20, (65-68), 22 is such a young age.
I joined the USN at 20, 1971-1975. 1965-68 was a very scary time to be in. 1971-75, not so much.
For 1969 & 1970, my draft lottery numbers were in the three hundreds!
Enlisted at 25, out at 28 (87-90). Still young.