<P> The narrative for the campaign mode focuses on the Pacific Theater and Eastern Front theaters of World War II , involving the United States , Empire of Japan , Soviet Union , and Nazi Germany . It is told from the perspectives of Marine Raider Private C. Miller , US Navy Petty Officer Locke and Red Army soldier Private Dimitri Petrenko , and is based on several historical battles . The multiplayer component of the game contains various game modes and a leveling system that allows the player to unlock additional weapons and rewards as they progress , similar to Call of Duty 4 and repeated in many following Call of Duty entries . Vehicles , in the form of tanks , that players can control appear on certain multiplayer maps . The game also contains downloadable content called `` map packs '' , which can be purchased online . A new feature to the series was the addition of a cooperative mode , which supports up to two players locally and four players online . </P>
who do you play as in world at war
Marine Raider Private C. Miller US Navy Petty Officer Locke Red Army soldier Private Dimitri Petrenko