Re: This is an Armed Response, Larry, not a Formal War . . .
Technically, we're not required to follow Geneva if a there has not been a formal declaration. As far as I can find, there has not been one from the U.S.
Sorta makes it difficult to judge a "War Crime" with no war declared. This could get pretty damned nasty on both sides pretty damned quick.
...Or not,
Dan