Want more military realism? Easy! Just add boredom, bureaucracy, KP, and burning feces in 55-gallon drums!
-- Break, Break --
Constructive suggestion? Do a little reading in the better books in individual military history to mine some ideas:
Red Badge of Courage (Stephen Crane, Civil War (fiction))
The Defence of Duffer's Drift (E.D.Swinton, Boer War, (fiction, but a good primer for simple scenarios))
All Quiet on the Western Front (Erich Maria Remarque, WWI)
Company Commander (Charles B MacDonald, WWII)
Band of Brothers (Stephen Ambrose, WWII)
Brazen Chariots (Robert Crisp, WWII)
About Face (David Hackworth, Korea-Vietnam)
Platoon Leader (James McDonough, Vietnam)
Dispatches (Michael Herr, Vietnam)
A Rumor of War (Phillip Caputo, Vietnam)
Tank Sergeant (Ralph Zumbro, Vietnam)
The Heights of Courage (Avigdor Khalani, Golan Heights '73)
The Defense of Hill 781 (James McDonough, Modern post-Gulf War (fiction, but like Duffer's Drift a good start point for scenario ideas))