[fjtorres]

Different folks have different definitions but not every story featuring soldiers or even war is Military SF. That end of the SF spectrum has a lot of variation that is not immediately apparent. Military SF in the strict sense is a very specific sub-genre, where the military aspect is milieu, theme, character, and plot.

The prototype is STARSHIP TROOPERS.
(The book, not the horrendous movies.)
A lot that outsiders describe as "military SF" is actually old-fashioned Adventure SF, Space Opera, or character-based drama that happens to tap into some military element.
The argument is in fact positively ancient as the perception of mainstream SF as "overly millitaristic" goes back to its pre-Campbell origins in the 20's and 30's, but not many folks would go as far as lumping Buck Rogers (Armageddon 2419, actually) or the Skylark Novels, in with STARSHIP TROOPERS or WEST OF HONOR.
Ultimately it really doesn't matter what the stuff is called; just whether it is good writing. And BAEN does have a lot of it.
To say nothing of Webscriptions, which, let's not forget, carries non-BAEN titles.

As a minor example, my most recent purchase from them was for Harlan Ellison's DANGEROUS VISIONS and AGAIN, DANGEROUS VISIONS. I'm hoping they'll soon add the LAST DANGEROUS VISIONS so I can complete the set in ebook form to match my original SFBC hardcovers. :-)