
Issued the Fuero de Leon, died in battle at Viseu.
Alfonso V convened a council in Leon and issued the Fuero de Leon, a charter that granted legal rights and privileges to the city's inhabitants. The fuero established a municipal government, regulated trade, and protected citizens from arbitrary taxation. It became a model for later municipal charters in Iberia.
Alfonso V initiated the repopulation of the Tierra de Campos, a fertile region south of the Duero River. He granted land and privileges to settlers from the north, establishing new villages and fortifications. This repopulation strengthened Leonese control over the region and boosted agricultural production.
Alfonso V died while besieging the Muslim-held city of Viseu in Portugal. He was struck by an arrow during the assault and killed instantly. His death left the kingdom in the hands of his young son Bermudo III and led to a period of instability.