Battlefield 4 Second Assault, featuring four fan-favorite maps from Battlefield 3 — Operation Metro, Caspian Border, Gulf of Oman and Operation Firestorm. Reimagined with Frostbite 3 graphics and Battlefield 4 gameplay, Battlefield 4 Second Assault will be released on February 18 for Battlefield 4 Premium members on PlayStation 4, PlayStation 3, Xbox 360 and PC, and for all Battlefield 4 players on March 4.
Following Second Assault will be the third expansion pack, Naval Strike, launching in late March for Battlefield 4 Premium members. In this expansion, gamers will experience water-based combat as the Chinese armada takes the fight to the sea. Gamers will have access to new weapons, gadgets and vehicles as well as four new maps — Lost Island, Nansha Strike, Wave Breaker and Operation Mortar.
Source: Battlefield Blog