You could join, graduate from boot camp and military occupation school, go to a combat zone, for just one day, complain about having mental problems and be medically discharged. As long as you don't get an Honorable, Dishonorable or Bad Conduct discharge (in other words a General under Medical conditions) you'll get free medical care and probably at least a partial pension for life. For those who question my service I served 12 years with five Honorable discharges (five years during the Vietnam Era, Grenada and Lebanon).