Problems.
One of the most blatent problems I saw with this movie is more of a nitpick than an obvious error. Marines never wear their rank on their covers. Other services, such as the Army, do this, but the Marine Corps didn't during this time period.
Another annyoing nitpick, is the behavior of the infantry Marines (during the scene when Zane challenges another Marine to pool) towards a civilian and ESPECIALLY towards Berenger. This behavior does not exist in the Marine Corps, and never has. Berenger plays the role of a Gunnery Sgt. No Gunnery Sgt, whether active duty, reserve, or even former-marine, would be treated like this by a junior Marine.
And another thing, snipers aren't considered 'spooky' or any more special then a regular infantry grunt in the Marine Corps. Snipers are FIRST and FOREMOST grunts EVER before being considered a Sniper (Snipers must go through Infantry school prior to scout/sniper school). Snipers fill a billet in the Marine Corps, and thus, are respected for what they do, and what they are.
My question is, what the HELL is a civilian going out on a mission with a seasoned Marine like Beckett? It would never happen in real life.
Don't get me wrong, it was a pretty good flick. It didn't have any basis in reality, so I hope no one gets the impression that this is anywhere near what would happen in real life.
Some other nitpicks, whilst Im at it :
Billy Zane patrolling with his sniper rifle -
A sniper rifle is not, in any circumstance, a patrollable weapon. It is a single shot rifle, that is hindered from patrolling by a number of factors, including the scope, which is a long distance mechanism. The only thing imaginable is that, if he encountered resistance, fall to the deck and engage the enemy. The idea of them carrying these weapons in the ready is ludicris, and retarded.
Too many sniper rifles in the team. -
A scout/sniper team consists of (bear minimum) 2 individuals (Unless your Carlos Hathcock). Only ONE of these people would have a sniper rifle. The other person, in this case, would have an m-16. The sniper in the team would have been carrying a 9mm.
Wheres their food? -
Realistically, these Snipers, (since their mission required longer then a few hours), would have brought a lot more supplys. They would have brought packs, sleeping systems, MRE's, extra water, guily suites, maps, flares, a camera, and so forth.
Talking too loud -
It was pretty funny seeing the two of them talking so loudly in the jungle. In a real mission, they would have been restricted by noise discipline. There language would have consisted of hand signals. When it was time to rest or sleep, they would lay down on the deck (not chilling on a tree), in a concealable position, and take turns at watch (one person sleeps whilst the other stays awake). REAL marines don't remenise about past fishing trips on a mission. They stay focused, and alert, and get the job done.
Zane is in command? -
No politician (well...Clinton probably would) would put a stupid-ass olympic civilian in charge of a real-life mission such as this.
Thats all I can think of right now.