Battle of Épila and the end of the Union Historical milestone · Épila, Valdejalón, Zaragoza Image of Épila, not of the place itself. On 21 July 1348 the troops of Pedro IV defeated at Épila the League of the Union, which brought together nobles and cities opposed to royal power. After the victory the king abolished the Unionist privileges and destroyed the documents that recorded them. 1348 Photo: Bibliofilotranstornado (CC BY-SA 3.0) What to see and do in Épila