U.S. Marine Combat Correspondent Matthew Callahan's photo essay "Galactic Warfighters" gives a pop culture look at what life is like in active combat. Using the iconic stormtroopers from the "Star Wars" franchise, Callahan gives us a detailed account of military life on the battlefield with a hint of quirkiness.

Advanced Recon Commandos rush to cover after being ambushed by separatist forces. The troopers were conducting a security patrol outside their company forward operating base when the droid forces attacked.
Sgt. Matthew Callahan