You had none, except perhaps some doctors. Otherwise if you got drafted, it was to the Army, or on rare occasions the Marines, and they didn't make you an officer. They might let you apply for OCS if you were otherwise qualified and did *really* well at basic and whatever training that followed. More likely they'd make you re-enlist first.
The Air Force and the Navy haven't taken draftees since well before the Vietnam war. I'm not sure if the Air Force has ever taken any.
People joined the AF and Navy to *avoid* being drafted.
One guy at my AF-ROTC field training, summer of '71, got his draft notice while at the training. I was in the two year program and we had not yet formally signed on as E-1 members of the AF Reserve when we attended our field training, which was 6 weeks long, verses the usual 4 weeks. He did, and quickly. The rest of us did it when we returned to our home Detachments. Det 465
“You had none, except perhaps some doctors.”
True but incomplete. We had a lot of folks who joined the Air Force to avoid being drafted into the Army. Officer and enlisted, and not just doctors in the officers.