I was active-duty army for the last half of the 70s -- decided to make it a career, though with some changes. First marriage in 1978 -- a veritable disaster. My first tour in Germany, and I did not want to come back to the States -- but I did, very briefly, before going back (different assignment).
The front half, I was just a high school band geek. I remember some pot-smoking, but that stopped after HS. But I do remember puking my guts out after an encounter with Boone's Farm Strawberry Hill wine, and that was even before I turned 18, which was legal at that time to drink. The bad part was I puked all over the side of Jeff's truck. He was not amused.