I tried for hours to form my experiences around camaraderie and the good ol' boys club in the military into a comment that would fit with this Geekfeminism post, but I couldn't manage to pull it together.
The phrase "This Man's Army" is very much appropriate to the military of today (or, at least, the Canadian Army of 1997, when I got out). By and large, it's still very much a white, male, heterosexist institution, but there are a lot more subtleties than an overarching summary would have you think, including a lot of pockets of very inclusive, principled, and thoughtful people.
Indeed, after a fashion, the military is a cornucopia of extremes. I saw humanity at its best and at its worst many a time during my short, part-time stint there. Young soldiers -- kids, really -- punished by being humiliated in front of their peers. Rumours that our WO had been passed over for promotion because he was black. But too, the noble parts -- soldiers standing up for an excellent officer when others tried to slag him because he was gay. Grizzled old sergeants admonishing junior NCOs not to address their charges as 'guys' -- "Call them troops! 'Guys' is sexist." Soldiers on a course rallying around a colleague who'd been harassed by one of her instructors.
I learned a lot there -- about myself, about others; about what it means to be honourable. That's one thing that can certainly be said about it.