I don't understand why he got out 4 years from getting his pension. You'd think after all he's been through he could tough it out for one more hitch in order to get his pension and full benefits. If he's no longer physically able to do combat missions, it seems like they could assign him to a school or a desk job somewhere - shit, he's at least earned that. Very sad, but it seems like there are missing details to this story.
I'm not mean; I just don't like you.