I don't think so, I know you can't get the Discovery Wings Channel on Express View right now :threat: You can however get it on Star Choice.
A long time ago there was a Military Channel on C-Band Satellite (it was free too). It was pretty good, but they had almost no advertisers, they had some good movies and documentaries, and things from the United States Armed Forces TV Network (not sure if I have the name right), so it actually had some military produced shows, rather than military themed shows. It unfortunately didn't last long.