Stop slating this film for 'not being a war film', for those of you who do are seriously miss-informed. Jarhead portrays beautifully the side of active service the civilian world does not see; the boredom, the prolonged stints of waiting punctuated by brief snaps of grueling physical exertion and pain, the frustration of fighting a non-conventional force by conventional means... and the heat.
If you are looking for a film which will have your mind numbed within seconds due to the body count, this is not for you... if you are looking for a glimpse of reality, a really interesting watching experience, and perhaps a little education... this is perfect.