It's just like any other business, really. The military is suffering from a shortage of recruits, so they put an ad in a place that is likely to get noticed. If you have people fully engaged in shoot-em-ups or tactical strategy games, then you've already found your target demographic. It's no different than if Nike were to adverstise in a (American) football game. -monkey
"Sometimes I think maybe I should join the army. Its basically like a FPS, just better graphics. But what happens if you get Lag out there? You're DEAD man! DEAD!" I even heard that RL doesn't have any respawns. What's up with that?