Having served in the Army, I have a little to add. I'm not supporting any action, just detailing a hypothetical situation:
Suppose someone wanted to leave the military with the least consequence possible. The quickest way to do it is to desert. This is very criminal and is likely to result in imprisonment if caught.
Another option is to malinger. This is also punishable under UCMJ, but it's hard to prove malingering. Read up quickly on a head or back injury, and go at it. A medical discharge is an honorable discharge and will result in full benefits.
Instead, he could choose to develop a real injury. Break a leg, or shoot self in the leg (with a sidearm, not an M-16
). This will not likely get him out of the Corps, but it has a good chance of keeping him in the USA for a while, and he might be allowed convalescent leave.
Other things such as EPS or mental health might be options, but are probably inferior. I think his best option is to fake a debilitating back injury. He is doing situps at PT one morning in the grass, and slams a rock into his vertebrae. Or something. Suddenly he can barely walk. Something like that.