In WORLD OF TANKS, there are more than 150 armored machines from pre-WW2 era up to the Korean War, which ar organized into three trees according to the nation they belong to: America, Germany and the Soviet Union. On launching the game for the first time a player can select a “starter” vehicle from any of the three nations. While fighting in the WORLD OF TANKS, a recruit tanker receives experience points and credits which allow exploring and buying modifications or new battle units from the American, German or Soviet tree branches, which a player has chosen to follow.