...Ourense, challenging the authority of her half-sister,…

...Ourense, challenging the authority of her half-sister, Queen Urraca of León and Castile.

Urraca’s Response: The Invasion of Portugal

In retaliation for Theresa’s incursions into Galicia, Queen Urraca launches a military campaign against Portugal. This conflict between the two sisters is part of the broader civil war and political struggles that mark Urraca’s reign.

This war further destabilizes the region, intensifying the power struggle between León and the increasingly autonomous County of Portugal, setting the stage for the eventual rise of Afonso Henriques and Portugal’s bid for full independence.