What is the biggest military movie/TV goof, basically the military Movie/TV mistakes that annoys you the most?

The worst one I can remember was in the movie "Iron Eagles" with Lou Gossett Jr. He steals a Priority "A" (at the time)/Protection Level 1 aircraft by intimidating an Air Force Security Specialist (Security Police/Forces) into letting him and a civilian access to the aircraft. In real life, he would have been put on the ground and then cuffed. Arguing would have only gotten him "butt stroked" with the stock of the M-16.

Another one is Security Force Members coming in and taking over for NASA engineers in "Armageddon". I guess I missed the training on that one.

Showing all these fabulously squared away civilians in the NCIS working all these crimes from one room in LA, or DC or New Orleans. No other agents out there? Plus -- all the data they can pull up in an instant. Where did they get that stuff? It's like the old movies where somebody would be given a file with an opponent's promotion photo. Just goofy.

A few acquaintances of mine are military advisors for Hollywood and helped shed some light on this subject. The advisors can tell the film-maker how to make everything 100% accurate, but ultimately it is up to the film-maker to make the movie how they think it will best entertain the plebes. There are creative decisions made to portray their vision and what they believe will be most easily understood, such as the villain in "American Sniper" wearing all black and a leather jacket during summer in Ramadi (Holy Heat Casualty Batman) or uniform discrepancies. This holds true for jacked-up tactics, the gratuitous explosions, never-ending magazines, excessive weapon sounds, etc. It's all to play to the entertainment of simple minds, not veterans.
On the subject of uniforms, most of the time it is based on someone in the costume department throwing something together that looks right or visually appealing. With the exception of "Basic" (which in my opinion is the worst military movie ever conceived), in general most costume designers have tried much harder to be more accurate with medals, patches and badges, largely from input from veterans and advisors.
As I said before, the advisors are there to advise, it is up to the film-maker as to how he or she utilizes it in their end product.

The movie; "Fury" I so wanted this to be a good movie because my Dad was in M4 Shermans during the Korean War Era.
Early on a crew member is shot leaving lots of blood and gore all over the inside of the tank. OK that's believable. Towards the end only three people are left. One is the new guy who is told to save himself and to use the hatch on the bottom to escape through. The other two wounded men left in the tank have a couple german grenades dropped in on them. First, the two grenades go off at different times although within seconds of each other. WRONG! One grenade would have set off the other one as well. Secondly, the new guy re-enters the tank and cries over two whole but dead bodies of his crewmates. WRONG! The inside of that tank would've been a bloody, drippy gooey mess and there would've been no hugging going on unless it'd be him hugging himself as he threw up everything but his toenails.

Not necessarily "military" but the recoilless Desert Eagle 50AE.

For me, it's the ones that really cause me to break my suspension of disbelief. In something campy, like the above still from Hogan's Heroes, I can forgive the German guard with the Tommy Gun because 1) it's campy comedy anyway and 2) there were problems getting MP-40s for the lower budget TV series back then. Rat Patrol had the same problem. But then Rat Patrol had bigger problems, starting with the whole concept was based on what the Brits were doing. That and the Aussie hat on the American character... One could spend a lot of time on that show...

Weapons of the wrong era... Those are a problem for me. A Forward Assist in 1964, for instance. But then I am pleasantly surprised when movies get it right. The M-16s in We Were Soldiers, for instance. Disclaimer: I did not slow motion or frame by frame the movie to make sure every single rifle was an M-16 and not an M-16A1, but the distinct 3-bladed barrel and lack of forward assist in the vast majority of shots was reassuring.

Location gaffs are another of my pet peeves. In one episode of The Unit, for instance, they state that the action is taking place at the Pine Bluff Arsenal and the nearby Pine Bluff Airport... The scene is clearly shot in an arid location (somewhere in California, I'm pretty sure), but Grider Field in Pine Bluff, Arkansas is on the edge of a cotton field!!! Yes, I know the show, like so many, is full of inconsistencies and military errors, but that one broke the wall for me as I've passed by both locations 100 times or more in my life.

Let me flip this: what military movie/TV Show do you think got it particularly right?

-Having people run around in ACUs with the damn mandarin collar up and no IBA. Spend the extra $8.00 and get the uniform pocket guide or Google 670-1 for proper wear. No one wears the damn collar up.
- Having US soldiers in WWI to Vietnam era uniforms with the corporal/ sergeants chevrons upside down. Mysteries at the museum just chaps my ass with this one. Can't concentrate on what otherwise would be a great show because the chevrons drive me bat shit. We aren't common wealth NCOs.
- Any movie that the Trooper pulls a grenade pin with their teeth. Friggin jaws from 007 couldn't do that, let alone a mere mortal (don't ask how I figured this one out).

Uniform foul-ups that could be easily avoided by doing simple research...or hiring a competent military advisor. And weapons mistakes, like guns that are single-action, gas operated (ie ALL assault rifles) going "click-click-click" when the magazines runs dy.

Gunfighting. If this is to be the central trope of your movie, how can you dare to get it so wrong?

#1 Shooting accurately is really hard. If you're outside of 25 feet with a pistol you're better off seeking cover or running. Rifles aren't magic either. You will miss a lot, so will the other guy. The principal point of the gunfight is to shoot the other guy, the secondary is to not be shot. This means stability in shooting position, clear sight alignment and picture are critical, anything else is wasted ammo. Cover matters and you can't dodge bullets. Teamwork is critical.
#2 Death has meaning, to both sides of a conflict. Real meaning.
#3 Clicking off safe is not racking a round, different sounds by far.
#4 Racking a round to show how serious you are when you just cleared an area or are in a threat area or something of the like. Either A. You're an idiot for clearing with a weapon in condition 3 or B. a round should have flown from the chamber and you're an idiot for wasting the extra round.
#5 Cocking a double-action pistol to show how serious you are is not the same as racking a weapon, different sounds, also a fairly meaningless action unless you need a lighter trigger squeeze.
#6 Not all pistols are double action pistols.
#7 Reloads. Dear goodness the reloads.
#8 Pistols are backup weapons or (very) close-work weapons, any real fighter knows this.
#9 It's not hard to find someone who knows all of the above, and yet no one seems willing to put the money into it or follow it consistently.

#10 Good gunfight movies? Black Hawk Down, Band of Brothers, most of End of Watch, Act of Valor (maybe the best not great acting, but the beauty and truth in those reloads cannot be denied.)

Here's 2 that always bug me.
Whenever there's a show/movie involving a carrier the CAG almost always seems to be conspicuously absent; his role in these movies/shows is always filled by the ship's Captain or a squadron CO who (conveniently) doesn't fly anything but a desk. Top Gun is blatantly guilty of this, I couldn't tell if the bald guy who chews out Maverick and Goose in the beginning is supposed to be the CAG (although he's only a Commander or Lt. Commander) or Maverick's squadron's CO. Then you have Behind Enemy Lines where the ship's Captain seems to be running air ops instead of the missing CAG.

The other thing that bugs me are convertible, and often doorless, Humvees. I don't know how many shows or movies where I've seen Humvees driving around without their doors on and often without roofs too. In my time in I never once saw a doorless, much less a doorless and topless, Humvee and my unit dealt with the soft top variants exclusively and so did every other unit I ever saw. Where do these convertible Humvees come from and where did the director/producer ever see one and thought that's how the military configures them?

Speaking of Humvees, that reminds of some B movie that I saw once where it had a crack unit made up of all former trouble makers/gang banger kids, in this movie they're on a mission somewhere getting shot at and their only means of escape was a Humvee. As if the basic premise wasn't ridiculous enough but in order to tie in to their past they have one of the kids make his way to the Humvee and proceed to hotwire it! I laughed so hard when I saw that, it was so obvious that neither the director or the screenwriter had ever been around a real military Humvee before since, as I'm sure most of you already know, there's absolutely no need to hotwire a Humvee, or just about any other military vehicle in order to steal it.