DubConqueror: That's why the comment about the Korean army (which Korea?) surprised me: what if the disabilities are mental, do you need to serve anyway?
At least here in Finland, you'd easily get an exemption from military service for either mental or physical disabilities... but I guess you should be diagnosed somehow first. Could be that the army doctors can do that too.
And even if you don't have any (diagnosed) disabilities, you could alsays choose one year of civil service instead, e.g. working in some retirement home or whatever. It is easier too because you get to go home every night, unlike in army.
I had a friend who couldn't stand staying in the army so he faked having a mental breakdown, opening the window and starting to scream in the middle of night. His superior came to tell he should visit the army doctor, which then diagnosed him as being not fit for military service, so he got an exemption.
Oddly though, later he regretted having not finished the service and wanted to get back...
For physical disabilities, a friend of mine who wanted to go to service was about to get an exemption against his own will because according to medical records he had had some kidney operation as an infant (it didn't affect his health at all as an adult). He protested and eventually got to the service.
I guess nowadays quite many young men here choose civil service instead, going to army isn't considered that important anymore by most, and it hardly ever helps you finding a job, ie. the employers aren't really interested whether you've been in the army or not. If you want to become a truck driver or something, it might be beneficial if you get to become a truck driver in the army first etc., not sure if it was even possible to acquire the (pretty expensive) truck driver license in the army.
For my own "service", there were both positive and negative things, but more of the negative ones. For instance, having to live together with people you couldn't necessarily get along that well (I guess the meaning is to learn to work with also "incompatible" people, but still...). I even got into a fight once during a march with someone I didn't get along that well. Then again, there were nice people there too, but I guess all the stress etc. could also get under people's skin and sometimes get the worst out of them.