Recommend some good Army games...

[Zangetsu]

hey why no one mentioned medal of honour (try 1 and 3 dont try pacific assult)
return to castle wolfenstine

soldier of fortune 3

go4saket has mentioned dat...

also try company of heroes

 

[pizzapuff]

Crysis, but its heavy on system requirements.
If you're into RTS, try World in Conflict.