Private Petrenko's campaign starts when he is part of the 62nd Army in a water fountain where he pretends to be dead and watches German soldiers execute the rest of his unit in Stalingrad. Along with an injured comrade, Sergeant Reznov (voiced by Gary Oldman), he seeks revenge on the Germans and the "architect" behind the attack, Nazi General Heinrich Amsel. Three years later, they meet again on the Eastern Front, alongside a third character, Pvt. Chernov. They advance towards Berlin with the 3rd Shock Army under the command of Commisar Markov, where they capture the Reichstag and, after Chernov is killed by a German flamethrower Petrenko plants the Soviet flag after being shot by a hidden German that is then quickly killed by Reznov.[19]

The third playable character in the campaign is Petty Officer Locke, a weapons operator on a PBY Catalina flying boat, who is only playable in the mission "Black Cats." This character is not available in the Wii version. Locke's squadron makes a raid on a Japanese merchant fleet in the Pacific and later rescues the survivors of a destroyed U.S. fleet.[20] Other non-playable characters in the game include Corporal/Sergeant Roebuck (voiced by Kiefer Sutherland), Sergeant Sullivan, and Private Polonsky (voiced by Aaron Stanford), who are in Private Miller's U.S. squadron.

didnt know that, but why were you looking up cod waw on wikipedia in the 1st place?