The U.S. Military is having a very difficult time filling quotas, for the War In Iraq, Afghanistan, Iran, etc..,so they keep leaning, more, and more, towards a mercenary Army. Thus the offer to the (illegal) immigrants.
Hmmmmmmmmmmmmmmmmmm
Reeeeeeaaaallly....
Well, we’ll have to do something about that...
That will take a change in the law or a SCOTUS decision...