The Second Assault DLC is the second expansion pack launched by DICE for Battlefield 4 that was originally released on 22 November 2013 as a timed exclusive for the Xbox One. The DLC features four of the most popular multiplayer maps from Battlefield 3 that have been redesigned on the Frostbite 3 engine. The maps in question are; Gulf of Oman, Operation Firestorm, Caspian Border and Operation M