I remember people in Germany who had to go underground to evade the draft, even as recently as the early 2000s.
Here's a story from 2002 about how the supreme court there upheld the legality of a military draft:
https://www.latimes.com/archives/la-xpm-2002-apr-11-mn-37321...
anyway, if you refused to be drafted and did not want to go to jail, you had to more-or-less stop using any government services, rent with roommates, avoid using a credit card etc. until you've reached some age, and then you could emerge again because the duty to serve expires at that certain (not very high) age. It was cuh-razy.
I had to go to the draft office in that time and behaved so badly that they didn't want to take me.
Also at that time only some people had to go to the draft, because they had not the capacity to take everyone. That made it likely easy for them to let go of suboptimal candidates.
I'm not sure how credible it is, conscientious objection is literally in the German constitution: https://www.gesetze-im-internet.de/englisch_gg/englisch_gg.h...