After Rafael Carrera returned from exile in 1849, the Salvadorean ruler, Doroteo Vasconcelos granted asylum to the Guatemalan liberals, who harassed the Guatemalan government in several different forms: Don José Francisco Barrundia did it through a liberal newspaper that had been established with that specific goal; Vasconcelos gave support during a whole year to a rebel faction "La Montaña", in eastern Guatemala, providing and distributing money and weapons. By late 1850, Vasconcelos was getting impatient due to the slowness of the progress of the war with Guatemala and decided to plan an open attack. Under that circumstance, the Salvadorean head of state started a campaign against the conservative Guatemalan regime, inviting Honduras and Nicaragua to participate in the alliance; only the