One early reason for the forming of MESTO was the instabillity of the former Gronkian colony of Novoyoakes, in Delgamia. Following a series of referendums, portions of Novoyoakes were annexed by Aros, Brolecia and Eastern Delgamia, while the remainder of the sparselly-populated territory was organized as the condominium of Mestonia, under joint sovereignity of all MESTO powers. This arrangement was officialized through the Treaty of Puerto Bravo and the Mestonia Charter, both documents signed by the MESTO member nations on the 25th of July 299.