The DLC adds a new gameplay mode where players take control over a premade strike group and have to use all of the available resources to their maximum potential in order to complete new historically-inspired mission.
A reconnaissance mission. Year 1942.
A US submarine sighted the largest battleship ever encountered. Their rapport must be confirmed by aerial scouts. The player is tasked with approaching the sighting area and sending recon and identify missions towards the new discovery. The area is not safe though. There are Japanese carriers patrolling it.