On 28 January 1851, Vasconcelos sent a letter to the Guatemalan Ministry of Foreign Relations, in which he demanded that the Guatemalan president relinquish power, so that the alliance could designate a new head of state loyal to the liberals and that Carrera be exiled, escorted to any of the Guatemalan southern ports by a Salvadorean regiment. The Guatemalan government did not accept the terms and the Allied army entered Guatemalan territory at three different places. On 29 January, a 500-man contingent entered through Piñuelas, Agua Blanca and Jutiapa, led by General Vicente Baquero, but the majority of the invading force marched from Metapán. The Allied army was composed of 4,500 men led by Vasconcelos, as Commander in Chief. Other commanders were the generals José Santos Guardiola, Ramón Belloso, José Trinidad Cabañas and Gerardo Barrios. Guatemala was able to recruit 2,000 men, led by Lieutenant General Carrera as Commander in Chief, with several colonels.