The Treaty of Zaragoza, also referred to as the capitulation of Zaragoza, was a peace treaty between Spain and Portugal signed on 22 April of 1529 by King John III and the Emperor Charles V, in the city of Zaragoza. The treaty defined the areas of Spanish and Portuguese influence in Asia to resolve the 'Moluccas issue', when both kingdoms claimed those islands for themselves, considering it within their exploration area established by the Treaty of Tordesillas in 1494. The conflict first developed in 1520, when the expeditions of both kingdoms reached the Pacific Ocean, since there was not a set limit to the east.