I found this section of the article especially telling....
Four years after the game was introduced at the 2002 Los Angles E3, and half way around the world in Mosul, Iraq, "America's Army" was having an effect. Sgt. Sinque Swales had just fired his .50 caliber machine gun at so-called insurgents for only the second time. "It felt like I was in a big video game," he said. "It didn't even faze me, shooting back. It was just natural instinct. Boom! Boom! Boom! Boom!" While Sergeant Swales found game training conditioned him for combat situations, other soldiers report "America's Army" played a direct role in guiding them to the military. Pvt. Doug Stanbro told The Christian Science Monitor in a 2006 interview that he "never really thought about the military at all before I started playing this game." An informal Army study of the same year showed that 4 out of 100 new recruits in Ft. Benning, Georgia, credit "America's Army" as the primary factor in convincing them to join the military. Sixty percent of those recruits surveyed said they played the game more than five times a week. And a 2004 Army survey found that nearly a third of young Americans aged 16 to 24 had some contact with the game in the previous six months.(12)