Battle of Viadangos

The Battle of Viadangos or Fontedangos (Fonte de Angos) was fought in the autumn of 1111 between the forces of Alfonso I of Aragon and the Galician allies of his estranged wife, Urraca of León and Castile, at Villadangos north of Luna, some twenty kilometres from León. Alfonso was victorious in a rout, but Urraca's son and co-ruler, Alfonso Raimúndez, escaped.

Shortly after the Battle of Candespina, where Alfonso and his ally, Henry, Count of Portugal, had defeated the Castilian troops of Urraca on 26 October, the queen sought to pull Henry away from his alliance with Alfonso. An agreement was reached between her representatives, led by Fernando Garciaz de Hita, and Henry at Sepúlveda. The queen and her new ally then retreated to Palencia, away from Alfonso's army, to finalise a partition of the realm which would have given Henry a greater share than Alfonso had offered. The fortified southern city of Zamora and the royal castle at Ceia north of Sahagún, both in León, were offered to Henry on top of his Portuguese possessions, as were some territories in Castile.

Henry appears to have demanded more than his assistance to her cause could command, however, for Urraca soon entered into secret negotiations with her husband; before leaving she left orders with her men to surrender Palencia to him. The Crónicas anónimas de Sahagún attribute this to the ambitions of Theresa, Urraca's half-sister, Henry's wife, who coveted a queenship and had joined her husband at Palencia. From there the trio split: Henry turned to Zamora to possess it, while Urraca and Theresa went first to Sahagún before the queen moved on to her capital, León. Alfonso moved rapidly to seize Palencia (as agreed with his wife) and he almost captured Theresa while taking Sahagún, before he moved on to León. Probably fearful of her husband's dominance Urraca retreated into the hills of Galicia, probably cut off from contact with her supporters, who were thus left unaware of the new situation.

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