I don't know how you can set up an army unit composed entirely of women and not see this scenario coming.
@deras: Yes, it's a spinoff of an original series by this artist about an all-female knights' order that apparently spends most of its time getting gangraped after losing battles.
The first one, Die Grunewald Riterorden, is about their major defeat where all of their champions get raped. The second one, Majestic Assalt [sic] moves a couple of years down the road, where their successors aren't faring any better, right up until the original set of champions bust themselves out of prison and kick everybody's ass. Then there's a bunch of comics focusing on what happened to each character during the time between #1 and #2. And Soldatenfrauen, which covers the rape of everybody not important enough to get raped in their own issue. And then this. There's also a couple of lengthy non-H comics focused on the group, probably because DPC decided it had been a long time since Majestic Assalt and he needed to remind us that these girls are actually supposed to be good at stuff. They're not here, but you can buy them on English DLSite.
The entire thing is actually a spinoff of an HTML-based puzzle/strategy game that he did a long time ago, which you can see on his website here: http://hx.sakura.ne.jp/~die-sque/dpc/kikaku/gk/index.htm
Short version: Anything by DPC that says Grassen War on the cover is from this series.