The Portuguese count, Afonso Henriques, decided to build the fortress of Leiria near the Nabão River, to support the defenses of Coimbra.

After its construction, Afonso appointed Paio Guterres, a dedicated knight known for his exploits.

Paio made daring raids into Muslim territories, causing destruction.

The Portuguese garrison defended themselves bravely, however, they weren't able to push back the Almoravids.

The Portuguese count was forced to abandon his campaign in Galicia, made peace with the Leonese, and returned to the south to avenge the defeat at Leiria, making preparations for a campaign against the Almoravids.