War Day. The guy who did the alien books co-wrote this, I think. I might be confusing him with another author tho.
It's from the point of view of two friends who go around the country post-WW3. It's not a military book per se, but it goes into what they think the after effects would be.
I'll warn you. I put this book down the first time I read it because it was too depressing. But it does end on a semi-positive note. It was also written about 20 years ago, and takes place then.
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It's out of print, but A Talent for War, by Jack McDevitt. Again, not really a war book, but the war is a central theme to the book. It's SciFi, but pretty good read.
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More sci-fi, but pretty good. The Last Legion, by Chris Bunch. Four books, not too long. Pretty good. Also check out Legion of the Damned, by William Dietz. Another four book series. Both series have books about 300 pages long, maybe a bit more. Not to wordy, like Clancy, and not skimpy on the details. Both series are well written.
'Sall for now...I'll probably be back with more.