The game also features an innovative card-driven system where each card may be used for one of four distinct actions: operations (movement or major offensives – cards vary from 2 to 5 in value), strategic redeployment, replacement points (rebuilding units after combat losses) or special events (see below). There are three separate decks of cards (Mobilisation, Limited War and Total War – the last contains events which happened late in the real war, and also has a slightly higher average value for operations points, representing a higher level of industrial mobilisation), the latter two being added to the deck in the course of the game.