By the way, what is "military ambient"? It sounds violent and yet calming at the same time.
Off the top of my head, stuff like Cold Fusion, Ghosts of Breslau, Rukkanor, Stahlwerk 9, Les Joyaux de la Princesse... Perhaps Rasthof Dachau also and A.R.S., but that's also crossing over into harsh electronics territory also,
It's basically ambient composed around militaristic themes, or around historical events.
Stahlwerk 9 has an album '1905' based on the 1905 Russian Revolution, and did a split with Cold Fusion and Rukkanor on the Civil War of the first Triumvirate with Julius Caesar... Les Joyaux de la Princesse has done a number of works based around the events in the military history of France, Rasthof Dachau recently published an album called 'Prison Poems' which the lyrics from were in part lifted from poems that were written by an IRA volunteer who died in prison, and the poems hidden inside a pen hidden inside his body.
you know... stuff like that.
EDIT:
oh yeah, and I forgot perhaps the most obvious example of all of this, which is Der Blutharsch's first 3-4 albums or so.