It established its independence in 1385, when John of Avis defeated John of Castile in the Battle of Aljubarrota.  
It established its independence in 1385, when John of Avis defeated John of Castile in the Battle of Aljubarrota.  The victorious John, who ruled as John the Great, signed the 1386 Treaty of Windsor with England, creating an alliance that was never broken.  Nonetheless, it remained neutral during World War Two, under the iron rule of Antonio Salazar.  For 10 points, name this country on the Iberian peninsula.
It established its independence in 1385, when John of Avis defeated John of Castile in the Battle of Aljubarrota.  
Portugal