About 40% of that generation was in the military. 8% were drafted, but a lot of the 32% who voluntarily joined did so in order to exercise some control over where they ended up. Even those who didn't serve, often had to deal with the overall risk hanging over their head, or were actively committing crimes to avoid the draft. The draft might have only directly affected 8%, but the threat of the draft, and people's decisions around that issue, was a huge part of that generation's lived experience.