We've moved past E3/CoD XP military recruiting, we're going full on uwu might snuggle with my fav snorlax plush and commit a warcrime 
CoD?
Goddamn, you're younger than Andy-kun in this case:
https://en.wikipedia.org/wiki/America's_Army
Wasn't America's Army the E3/con one? 
CoD XP had you ride in a JEEP and a bunch of ex-military shot brown people armed with RPGs as you drove by.
E3/Con?
Er-No? It was
literally made for/by the Army. They gave it out for free to kids in the attempt to get them recruited because "kids today like video games, yeah? Let's go to them."
From what I remember it was "successful" in terms of getting people to play, but not successful in getting them to sign up. The Jingoism of 9/11 is what caused folks to sign up (if not being dirt poor and needing to do that to get a "free" college degree if they survived Afghan/Iraq)