When the LtCol's tank is confronted by enemy infantry he uses his .50 Cal by using its butterfly trigger which would allow the weapon to fire, but by doing it that way he couldn't have aimed the weapon system, and it exposes himself to danger. Instead he should have used commander's control inside the tank which would have been safer for him and he could change the elevation and traverse the cupola.
When Serling leaves Hershberg's office after their confrontation, he is seen from the inside of the office not carrying anything, but when we see him from outside (immediately after) he is carrying his files.
When Col. Serling is in the motel room looking at a photo of the mother and daughter sitting on a porch swing, the view of the back of the photo shows it is substantially wrinkled. When the front of the photo is shown it is unwrinkled.
Just after the Huey is hit, Ilario is seen hanging out of the left side of the helicopter. In the very next shot from inside the helicopter, Ilario is still inside the helicopter, then falls back as the helicopter spins out of control.
When Serling turns in his final report to Hersberg, he slams it down on the table. When he raises the folder, his thumb on the bottom, but in the next shot, of the folder on the table, his thumb is on top.
When Monfriez and Serling are driving in Monfriez's convertible, they are directly alongside the train, but when Monfriez pulls onto the tracks, the train is nowhere in sight. They did not drive far enough or fast enough to get that far ahead of the train.
In a meeting between Serling and Hershberg in Hershberg's office, Hershberg sets a book down on his desk with the binding facing the wall. When the meeting ends and Serling walks out, the binding of that same book is away from the wall.
LTC Serling accidentally shoots a friendly tank and kills his friend "Boylar." LTC Serling references "Boylar" as "Lieutenant Boylar." However, in a photo showing both Serling and Boylar (where Boylar is wearing a desert "boonie" hat) Boylar is wearing the subdued rank of Captain, not Lieutenant.
When Capt. Walden's helicopter is circling the Iraqi tank and attempting to neutralize it, there is a quick split second where the tank is in the foreground and the helicopter behind it. At that exact moment, you can clearly see a man with dark brown hair in a blue shirt and khaki pants on or near the tank.
Just after Monfriez's car is hit by the train, you can see some sort of carriage that the car is mounted on. The rear rims of the car also look like train wheels (that belong to the carriage the car is mounted on).
We see a locomotive skidding with its wheels locked in a shower of sparks. Locomotive wheels do not lock up when the emergency brakes are applied because, a) it won't stop the train any faster, and b) it would create flat spots on the wheels which are very expensive to repair.
The Huey had long-range fuel tanks installed and they disconnected them to drop them on the tank to destroy it. In real life, it takes about an hour to uninstall the long-range tanks and if they are full of fuel you can not unhook them from the over head hook they are connected to. You have to drain all the fuel out to get enough slack to unhook them.
The M1A1 used by the 2nd ACR (Armored Cavalry Regiment) of which Col. Serling plays a part fires a 120mm combustible case round. Only the aft end cap comes out of the breech after firing, not the whole casing.
U.S. Army Medivac Choppers marked with the Red Cross, are covered by the Geneva Convention, thereby allowing the aircrew to only carry personal weapons. So no M-16's or M-60 machine guns would have been allowed on "Dust off 3". The Red Cross marks the copter a non-combatant, medical vehicle. This would make it a war-crime for enemies to fire upon it. However, for Meg Ryan's character to take her Red Cross marked copter in to attack enemies would be considered a "perfidious act" -- a very serious war crime.
While Dr. Mary E. Walker was the first woman to be awarded the Medal of Honor (in 1866, for bravery as a surgeon), Capt. Walden would have been, as stated, the first woman to be nominated for the medal "for performance under fire".
After Monfreeze shoots Walden, he says "Christ captain, I thought you were firing at me!", she then points the gun at him and cocks the hammer on her pistol after having fired at the Iraqis. This would not be necessary with a .45 as the slide automatically re-cocks the hammer when fired. Even if she had reloaded, the hammer would still remain in the rear position after having replaced the magazine and released the slide. The pistol was a Beretta 92 (military designation M-9) in 9mm, on which the hammer could be decocked, allowing it to be manually cocked. It's uncertain if an army pilot's training would have been to keep the pistol decocked and it will fire the first round without being cocked in any case.
After Walden's helicopter crashes, Ilario is tending to Rady who is injured and unconscious. When Ilario ask's Walden for a hook to hang the IV bag, Rady, still unconscious, opens his eyes for a second, then closes them.