There was a time when every 18 year old male in the US of A had to sign up for the Selective Service. If you had a condition that precluded you from military service you could ask for a “medical deferment”. It was not something I thought about. I was skinny and wore thick glasses to see, but I was extremely in shape. Once you signed up, you were given a “draft number”. The numbers were called in a random order, so you never knew if your number was close or not. However, over time it was easy to guess if you were going to be “called up” by the number you had. Hint! Higher was better. It wasn’t a perfect system, but it worked for the military.
If you were “drafted” you had a very high chance of ending up in Vietnam during the 1960’s and 70’s. It was the “most likely place to go” once you were trained. I was no different than the other millions of guys who were drafted during that time… except I was only 17 when I graduated from high school. So, along with two friends, I JOINED! No accounting for youthful enthusiasm.