Battle of Trancoso (1140)

The Battle of Trancoso occurred in 1140 during the Reconquista when Afonso I of Portugal defeated a contingent of Almoravid raiders near Trancoso in Portuguese territory. == Background == In December 1135, Afonso began the construction of a defensive fort at Leiria, south of the Mondego River in the unstable territory approximately halfway between Coimbra and the powerful Muslim fortress at Santarém.

Source: Wikipedia — Battle of Trancoso (1140) (CC BY-SA 4.0)