Eldridge has the idea of starting a grass business in Iraq with Sanborn called "Sanborn and Son" - I'll grow it, you cut it.

James is listening to this in the barracks when Sanborn meets him.

This song is played during the closing credits.

This song is played in the barracks while the guys are getting drunk after the run-in with the snipers in the desert where they meet up with the other "friendlies".

Eldridge is shown playing Gears of War in the barracks while talking to the doctor (Chaplain?). This was actually a goof in the plot as the movie is supposed to take place in 2004, but Gears of War was not released until November 2007.

The quote at the beginning of the movie ("The rush of battle is a potent and often lethal addiction, for war is a drug.") is from this book.