Maybe some building must be "defensive" and some - "mobile" ?
Lone wrote:
For the HQ I'm thinking like this:

you could simply call it the HQ.
"
No, really, Red army don't have such buildings as front line HQ in 1943-1945. Coz its looked very stupid, and Red army officers wasn't so stupid to place a lot of flags and Stalin's pictures on it, to make a good target for bombers. ("Hey you, in Stuka! We are here! :P ;D)
Hq - Like US HQ, but with red banner on it :)
Basic Barracks(us "Barracks" & German Wermacht quarters) - Simple square tent.
Improved Barracks ( US weapon support center & German Krieg Barracks) - wooden house, fortified with sandbags etc. etc.
Nice idea about Armory, Vehicle/tank depot!
about bunkers.
I have a very :P stupid :P idea for you - make the famous Soviet "Rouble and 50" pillbox as a MG-nest.
aid station - "Zemlyanka".
"I'm in ur baze, killin' ur doodz" :-D
Sorry guys. My english sucks :-(