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  ===''A Clash of Kings''===
  The expansion ''A Clash of Kings'' was released in 2004, and added several variant rules that can be used with the base ''A Game of Thrones''. Additions include House Martell, a new unit type (Siege Engines), rules for ports, a second possible set of 7 House character cards for all six Houses with a wider variety of effects, and new unique special orders for each House. This expansion was integrated into the base game with the release of the second edition.