Here are the details on the Maps and vehicles:
Multi-player map:
The Battle of the Sibuyan Sea provides a new multi player experience based on one of the major battles of the Leyte Gulf Campaign, the greatest naval warfare battle in history that effectively destroyed the Japanese fleet in October of 1944. Players command either the US Fleet featuring the USS Iowa and USS Enterprise or Japans finest fleet, Kurita, featuring the super battleships Yamato and the ill-fated Musashi.
Single Player Map:
The Raid on Truk is based on Operation Hailstone, a massive naval air and surface attack launched by the United States Navy against the Japanese naval and air base at Truk. The devastating attack took place in mid-February 1944. Players command the US Fleet in a four phase battle starting with a P-38 air strike and leading to the command of the USS Enterprise and her screening force.
New Vehicles:
P-38 Lightning
A fast, powerful and distinctive twin-engine interceptor and one of the most important American fighters of the Second World War. Its long range and twin engines made it well suited for duty in the Pacific.
Nakijima J1N1 Gekko
The first Japanese aircraft designed and built specifically to intercept and destroy other aircraft at night. It was deadly against Bombers and as a powerful kamikaze plane against ships.
USS Iowa (BB-61)
The lead battleship of its class. Nicknamed The Big Stick, this famous flagship fought in numerous and significant battles in World War II and the Korean War.
IJN Shimakaze
The IJN Shimakaze (Island Wind) is considered to be the fastest and most powerful Destroyer of World War II and she was the only one of her class built.
Type A mini-sub
The Type A mini-sub was a two-man submarine. Difficult to detect, the Type A submarines were used during the attack on Pearl Harbor, Hawaii and throughout the war.