Afonso Henriques, knowing that Alfonso VII was occupied with the conflict with the King of Navarre, took advantage of this opportunity to invade Galicia with his army, taking Tuy, seizing some castles by betrayal and causing damage in the area.
The peace treaty was signed and witnessed by Paio Mendes, the Archbishop of Braga and the Primate of Portugal, for the Portuguese, and the bishops of Segovia, Tuy and Ourense for the Leonese side.
It is said that when Archbishop Paio Mendes, who was in Tuy and signed the agreement, acquainted the Portuguese count Afonso with its terms, he refused to abide by them.
[1] The treaty did not oblige Afonso to directly declare himself a vassal of the emperor, but subordinated him to the Leonese crown in matters of land ownership.
However, the king of León and Castile never renounced his claim to overlordship, as shown by the protest he directed to Pope Eugene III on the occasion of the Council of Reims (1148) as well as Alfonso VII's tenacity with which he fought until the end of his life for the ecclesiastical primacy of Toledo over all the Hispanic territories.