Here's an example.

When I last did this RP. One of the characters had Specops training, paramilitary and mercenary background.

Another example in the game this takes alot of inspiration from, one of the characters was former IRA and a former prisoner.

I can honestly tell you, my character is going to be a former JTF2 operative who had been working paramilitary security in Rwanda up until now.

Does that answer your question?