Upper March
Historic name for a region of northern Spain / From Wikipedia, the free encyclopedia
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The Upper March (in Arabic: الثغر الأعلى, al-Thaghr al-Aʿlā; in Spanish: Marca Superior) was an administrative and military division in northeast Al-Andalus, roughly corresponding to the Ebro valley and adjacent Mediterranean coast, from the 8th century to the early 11th century. It was established as a frontier province, or march, of the Emirate, later Caliphate of Córdoba, facing the Christian lands of the Carolingian Empire's Marca Hispanica, the Asturo-Leonese marches of Castile and Álava, and the nascent autonomous Pyrenean principalities. In 1018, the decline of the central Cordoban state allowed the lords of the Upper March to establish in its place the Taifa of Zaragoza.