Battle of Alcoraz
The Battle of Alcoraz took place in 1096 outside Huesca, pitting the besieging forces of Peter I of Aragon and Navarre against the relief forces of Al-Musta'in II of Zaragoza.
The siege was begun some two years earlier by Peter's father, Sancho Ramírez, who had camped at the time in the Castle of Montearagón. While inspecting the siege efforts around the walls, Sancho was killed by an arrow. His successor continued the siege and, at nearby Alcoraz, defeated the troops of Al-Musta'in come up from Zaragoza.
Later legends hold that during the battle Saint George appeared above the crown of Aragon, in support of the effort of the Reconquista. This parallels similar visions of Santiago Matamoros in support of the Christian forces of Asturias in the Battle of Clavijo over two hundred years earlier.