Early Germanisation went along with the Ostsiedlung during the Middle Ages in Hanoverian Wendland, Mecklenburg-Vorpommern, Lusatia, and other areas, formerly inhabited by Slavic tribes – Polabian Slavs such as Obotrites, Veleti and Sorbs. Early forms of Germanisation were recorded by German monks in manuscripts such as Chronicon Slavorum.[citation needed]