After Carrera returned from exile in 1849, Vasconcelos granted asylum to the Guatemalan liberals, who harassed the Guatemalan government in several different forms: José Francisco Barrundia did it through a liberal newspaper 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 at the slow 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 Honduran government led by Juan Lindo accepted.
