The Alliance of Central European States (German: Allianz der Mitteleuropäischen Staaten) was a large, collective Alliance in the center of the European Continent. The Alliance was created on November 23rd, 1955, through an international treaty between Germany, Austria, Poland, the Czech Republic, the Swiss Confederation. At a later time, the Swiss Confederation left the Alliance and was replaced by a Swiss break-away State, Liechtenstein.