Orwell wrote:
Does anyone know? I have tried before to find specific information about what exactly would disqualify someone from military service.
In the USA, any condition that requires ongoing medication (unless that medication is antidepressants prescribed to front-line soldiers by a military physician/psychiatrist, of course) would disqualify someone, even if that person had a sought-after skill set and degree. That's about it.
However, if there is a draft, then NOTHING AT ALL disqualifies someone from military service. If they want you, they have you.