Analysis of information sources in references of the Wikipedia article "Battle of Viadangos" in English language version.
. . . su regreso por la zona de Castilla destrozó a los partidarios del conde Pedro y, saliendo tras ellos los copó en Monzón, cerca de Palencia, donde huidos se habían refugiado con la reina, y logró capturar a algunos de ellos; de esta manera regresó a León distinguido por dos triunfos.
". . . [Alfonso's] return through the zone of Castile destroyed the partisans of the count Pedro and, trailing them, he cornered them in Monzón, near Palencia, where they had taken refuge with the queen, and he succeeded in capturing some of them; in this manner he returned to León distinguished by two triumphs."