The first movie is set in 2020, yet in this movie (a sequel) the at the 8 nations summit it is mentioned about making all nuclear nations nuclear weapon free by 2016, implying it's even earlier than that in this movie.
In the desert, just before stumbling upon the airfield, Flint is wearing a full face mask to keep desert dust out. In the next shot the mask is gone.
When Snake Eyes is taken into the prison, he's told that they descend so far that they are no longer in Germany, but are in international territory. Most conventions hold that a country's claim extends down to the center of the Earth, and up into space. (US Property Law holds the same convention with regard to a persons real property)
In the French president's suitcase are two buttons respectively labeled "avorter" and "bras". "Bras" is French for arm, the body part. The correct word is "armer".
A stop sign at the prison reads "Hält" while it should just read "Stop" (even just "Halt" is rarely used on signs in Germany). The German word "hält" has different meanings, i.e. "he holds something", but it does not mean an order to stop a vehicle.
On the Israeli's weapon suitcase, the Launch button's label says "HESHIK". This is a correct word, when planning to launch a new perfume campaign. The correct word in Hebrew for a missile launch is "SHIGUR".
On the Indian briefcase, the screen shows the wrong spelling of "Aatm Vinaash", meaning self-destruct.
General Colton gives Roadblock an autoloading pistol in a presentation case. The pistol is cocked in the case, bad form, but not impossible. Roadblock removes it from the case by putting his finger inside the trigger guard, which no experienced soldier would do, regardless of whether it was cocked or not.
When the Joes are recovering what appears to be one of the MIRVs from the ICBM, it is initially lifted by two men and then by one. These MIRVs usually weigh a minimum of 400 pounds and up to 800 pounds, yet it is handled like it weighs about 40 pounds.
At the end of the movie, Bruce Willis Character gives Dwayne Johnsons character an auto-loading pistol in a presentation case. The pistol is cocked in the case, bad form, but not impossible. Roadblock removes it from the case by putting his finger inside the trigger guard, which no experienced soldier would do, regardless of whether it was cocked or not.
At the nuclear summit scene, U.S. Navy ships are shown launching nuclear missiles. Nuclear missiles were removed from U.S. Navy ships in the early 1990s.
During the desert battle scene, a snatch-cable is visibly attached to one of the Joe's just before an explosion's concussion blasts him backwards.
Fort Sumter is not located near any bridges and sits in the middle of a harbor surrounded on all sides by water and on land big enough to not be able to drive on.
During the Zeus 1A launch, the control room shows a targeting reticule on Britain, centered over the west-midlands. The target for the Zeus weapon is London, yet the center of the target reticule is between 50-80 miles outside of London.
When Cobra commander was showing the map of each country to be destroyed, the map showed Tibet instead of Beijing as the capital of China.
Zartan, posing as The President, tortures the real President for information regarding where Cobra Commander has been imprisoned. But, surely the leader of the free world (and America's highest ranking official), would (in this case, Zartan disguised as the P.O.T.U.S.) be privy - and have any-time access - to this information.
When Jaye retrieves "a strand of hair" (thus a long hair) from the President, it shouldn't be made of Zartan's DNA (which has very short hair) but of "nanomites".