Northern March
The Northern March or North March (Latin: marchia aquilonalis, or marchia septentrionalis; German: Nordmark, pronounced [ˈnɔʁtˌmaʁk] ) was a frontier province (march) of the Holy Roman Empire, centered on the middle Elbe and encompassing regions of Polabian Slavs towards the east, up to the middle Oder. Initial jurisdictions at the Eastphalian (eastern Saxon) sections of the Elbe border were established already at the beginning of the 9th century, when Charlemagne appointed Odo, an eastern Saxon commander, as legate in charge of the frontier region on Elbe (in later Altmark).