Gamertell has video of people dressed as military personnel in Homefront marching into E3 2010.
"Beneath the South Hall of the LA Convention Center there was an army. I’m talking about an army of persons who were unaffected by the huge screen projecting a trailer for Star Wars: The Force Unleashed II. Any human being who can turn a blind eye to light sabers and force lightning must have gone through intensive training. I present to you the army inspired by the upcoming game Homefront."