hmm
this really is a no brainer:
Close Combat2: A bridge too far (espeically with the Ranger mod, it rocks!!!)
Close Combat5: invasion normandy
close combat4: battle of the bulge was good, but not as good as 2 & 5
FPS are a dime a dozen and anyone can play them, they dont necessarily require brains, they are point and shoot.
CC requires brains and solid strategy, you must use your men wisely or you are going to end up up the creek
if i had to play a more mainstream game:
vietcong and Fist Alpha (yes i know they are FPS, watch me put my foot in my mouth)
full spectrum warrior
if you are into military related games, and like strategy (and no, im talking real strategy, not C&C "lets just amass massive armies and call it strategy" you really should take a look at the CC series, it will blow you away