A. Mental institution. If you have been involuntary admitted to a hospital, that doesn’t necessarily mean it’s cause you were crazy. It could have been you were severely injured in a car crash and couldn’t make medical decisions on your own, etc. You can be forced to go into the Military unless the draft was initiated (in the United States.) However, if you are forcibly put into a mental institution, then you have shown signs or evidence of mental instability and continued lack of unable to come to reasonable decision making.