The Quadrilateral Alliance, or just the Alliance, is a military and economic interventionist alliance of support between the FTC, the Asterian Communality, the Aquiax Accord and the Unchained Frontiers. Its main objective is to protect Earth from falling into the control of the Larux Authority or some other damaging power like Galilea.
Alliance personnel, in the form of the Solar Constabulary, are far more restrained than the FTC or even the Asterians since they are mostly aliens who have reservations on whether or not to intervene in Earth's matters.