A Costa Rican division under General José M. Cañas started for Nicaragua, November 2d, and notwithstanding the enemy's efforts to hinder it, occupied San Juan del Sur and the road to La Vírgen, thus cutting off Walker's communication with either point. It concentrated at Rivas on the 13th, and was joined by Jerez with 300 Nicaraguans. It was now in communication with the main combined army, which was preparing to assail Granada. Belloso received information from a friend in that city that Walker was on the point of making another dash on Masaya with 600 men. The allied army, in the city and vicinity, was now of about 3,600 men,[XVII-32] and leaving out wounded, sick, and servants, the effective force must have been no less than 3,000. The filibusters came on the 15th under Bruno Von Naztmer, a German, and were met outside by Nicaraguans and 600 Guatemalans at three o'clock in the afternoon. The enemy opened fire, and the Guatemalans fled panic-stricken. However, the first charge of the filibusters was checked, and they now assumed the defensive. The Guatemalans returned to the charge, and heavy fighting followed, which lasted till night. The next morning Walker took command, Naztmer being wounded, and pushed his operations into the town, where the allies had concentrated in the night, burning a number of buildings; but he soon convinced himself of the impossibility of accomplishing his purpose, and retreated to Granada in the night of the 18th.[XVII-33] At a council of war, it was resolved to evacuate the city, after setting fire to the buildings, leaving a garrison to keep the enemy in check. This work of destruction was intrusted to Henningsen, who at once ordered the citizens to leave the place within a few hours before it was consigned to the flames. And all the time the authors of this vandalism were calling the Central American defenders of life, home, and liberty savages and greasers, and themselves lovers of freedom and disseminators of civilization![XVII-34]