In the press materials for the game, Miles is listed as a first sergeant, but in the game he's referred to as a master sergeant.
The USMC and U.S. Navy pilots are wearing U.S. Army pilot helmets. The USMC and USN use different pilot helmets.
The USMC are shown using the M1A2, when only the U.S. Army uses them in real life.
The M136 AT4 is not reloadable in real life.
The U.S. Army does not use the MTVR truck.
The 5-inch guns on the Arleigh Burke-class destroyers have two barrels, whereas in real life they only have one.
The USMC MCIA officer has a British accent.
The USMC are using F-35s in 2009, when they only started to use them in 2015.
The USMC are using the AH-1Z in 2009, when they only started to use them in 2010.
Some characters mispronounce "Corpsman" as "Corpse man".