EndWar/YMMV

Continuity Porn - Former Ghost Leader Captain Scott Mitchel is the head of the JSF, the JSF's attacker aircraft is flyable in H.A.W.X., many European commanders were in Team Rainbow, Third Echelon supplies the JSF with information, the JSF recruits from Ghost Recon, etc., etc.
Player Punch: When you send your units into completely suicidal situations that there's no way they'll possibly escape from (which you're bound to have to do at least once), they tend to respond in sad, quiet voices with things like 'Wish us luck!' or 'We'll try our best, sir'. Anyone who doesn't feel like a complete and total bastard in that situation isn't human. Later in the game, every time a unit dies becomes a major Player Punch as well.