I agree with capt. wacky, you wouldn't wait if your mates have just been blown to high hell, you'd grab your weapon, ammo and anything else you need to kill the bastards. and you definately wouldn't wait till 6 for a briefing and then another 2 hours just to hear a briefing and get moving. i say you have everyone running out of tents, and some guy's running around saying that the forward position has been hit, so that people know the drill, then have 5t trucks pull up, to give everyone the idea that your moving out. you also wouldn't be getting assigned to a platoon at the last minute, they're with you, not at the forward pos. so they'd still be alive, therefore if you were in charge of a platoon, they'd be looking for you and vice versa. it seems that your doing a lot of retreating, what if you had dynamic objectives, so depending on how you carry yourself and your men decides whether you need to retreat or not. finally, about the marine force recon group, you don't just get assigned to the job of leading an elite special forces group on a scouting mission, so unless that platoon at the start is changed in to a squad of force recon men that your in charge of, it's not gonna fit.
Other than that though, it could be a beautiful mission, i look forward to playing it mate