Arzú's defeat produced a deep impression in Guatemala, where such a result had been unexpected, the expedition having been fitted out with the utmost care. Fears began to be entertained that the Salvadorans might become aggressors and invade Guatemala. The friends of Mexico were therefore much pleased on hearing that the Mexican commander, Filisola, had been ordered to supersede Gainza, who was summoned to Mexico.[IV-7] With about 600 men Filisola arrived in Guatemala on the 12th of June, 1822, and ten days later took possession of the government. He inaugurated a comparatively good state of affairs; for though as a supporter of the Mexican cause, and specially of the empire, he aimed at consolidation, yet his policy was a conciliatory one.[IV-8] He endeavored to obtain the assent of Salvador to union with Mexico without resorting to force. At first his course presented a promising aspect, inasmuch as the representatives of the former apparently made little objection; and on the news of Iturbide's call to the Mexican throne, among the many congratulations received by Filisola were those of Salvador, delivered by a special deputation. But the object, as it turned out, was merely to gain time. The negotiations were continued several months, hostilities having been suspended by both belligerents, till early in September it was agreed that further negotiations should be carried on directly with the executive and congress of Mexico.[IV-9] This agreement was not carried out, however, owing to new difficulties raised by San Salvador. Filisola, who evidently would not assume the responsibility of war, referred the whole matter to Mexico for instructions. Iturbide, who had just dissolved the Mexican congress for its opposition to his plans,[IV-10] felt no inclination to permit little San Salvador to dictate the terms of union, and disallowing the armistice concluded by Filisola, ordered him to begin hostilities forthwith if unconditional submission were refused.[IV-11] [Sidenote: FILISOLA'S CAMPAIGN.]