The Alliance of Sovereign Governments (A.S.G.), commonly referred to as the Alliance, is an intergovernmental military alliance based on the Alliance Treaty, which was drafted and signed on January 1, 2310. The organization constitutes a system of collective defense whereby its member states agree to mutual defense in response to an attack by any external party. The Alliance's headquarters is located in Chicago, United Columbian Federation. [Brief History] [Military operations]