The Wendish Crusade, an 1147 campaign, is one of the Northern Crusades and also a part of the Second Crusade, led primarily by the Kingdom of Germany inside the Holy Roman Empire and directed against the Polabian Slavs (or "Wends").By the early 12th century, the German archbishoprics of Bremen and Magdeburg had sought the conversion of neighboring pagan West Slavs to Christianity through peaceful means.

During the preparation of the Second Crusade to the Holy Land, however, a papal bull had been issued which supported a crusade against these Slavs.The Slavic leader Niklot preemptively invades Wagria in June, 1147, leading to the march of the crusaders in late summer, 1147.

They achieve an ostensible baptism of Slavs at Dobin and are repulsed from Demmin.

Another crusading army marches on the already Christian city Stettin, whereupon the crusaders disperse upon arrival.The Christian army, composed primarily of Saxons and Danes, forces tribute from the pagan Slavs and affirms German control of Wagria and Polabia, but fails to convert the bulk of the population immediately.