Well, I'm not sure what the burning-face smiley is all about, but the immmediate payment of $12,420 is to offset burial expenses. Very shortly, there is a payout of $400,000.
I don't see that the death gratuity has anything to do with the Feres doctrine.
I also don't understand where you get the idea that a service member can't be sued or how you think that suing Laurean for wrongful death or whatever would have to do with involving "the judiciary in sensitive military affairs." He didn't kill her as part of his military duties.
I haven't seen Maria's father, either. That's why I was asking about the marital status.