Seconding this...
Forever War is probably some of the most readable, non-America-Fuck-Yeah military sci-fi I've read--another good one is
Armor.
If you want more military sci-fi, check out the Hammer's Slammers series by David Drake (tank company in spaaaaaace, but not the stupid Bolo stuff); he also had one anthology that was very nearly solid cyberpunk surveillance dystopia, Lacy and His Friends.