It was at this critical moment that the congress of San Salvador, carried away by hatred to Guatemala and Mexico, resolved upon a singular step. On the 2d of December, 1822, the act of incorporation with Mexico was repealed, and the state was placed under the protectorate of the Anglo-American states, as an integral portion thereof. Solemn protests were made in the name of that republic against Filisola's hostile acts. A member of the congress, Juan Manuel Rodriguez, was commissioned to make known the incorporation to the government of the United States.[IV-16] For a short time it seems that hopes were entertained of an armed protection on the part of the northern republic in favor of the new acquisition; but soon the folly of such expectations became apparent. Filisola disregarded the protests,[IV-17] and after several victorious encounters, routed the Salvadorans under Arce at Mejicanos,[IV-18] and entered the city of San Salvador without further opposition on the 9th of February, 1823. Filisola fulfilled the promise he had made the preceding day to the ayuntamiento, that he would respect all rights, and not treat the town as a conquered country. The only Salvadoran force remaining was compelled, on the 21st of February, to surrender at Gualcince, a town on the other side of the Lempa River.[IV-19] This was the end of the war.[IV-20] Arce, who departed for the United States, wrote Filisola from Belize a letter full of firmness and dignity, meanwhile thanking him for his humane conduct. Delgado remained at his hacienda. The local authorities swore allegiance to the Mexican empire. Filisola now returned to Guatemala,[IV-21] where he arrived about the 6th or 7th of March. He had already received the news of the movement in Mexico resulting in the overthrow of Iturbide. It was this that hastened his return to Guatemala, and induced him to adopt a course opposed to his last instructions from Mexico. Granada, in Nicaragua, had not been reduced to obedience. Governor Gonzalez Saravia had asked for troops to accomplish it, but Filisola declined to employ coercion; and after informing him and Juan Fernandez Lindo, governor of Honduras,[IV-22] as well as other officials in the provinces, of the state of affairs in Mexico, assured them that he would take no important step without first obtaining their assent. Indeed, after he convinced himself that the imperial government had fallen never to rise again, he arrived at the conclusion that he had no right to keep annexed to Mexico the Central American provinces; as the annexation had been made solely, as claimed by Mexico and her supporters, for the sake of securing stability to their government, and the respect which would be afforded it from a long distance by a great and wealthy country. All this prestige had disappeared, owing to the revolution at Casa Mata in Mexico,[IV-23] the paper money, and other arrangements made by Iturbide with reference to these provinces.