Earlier, an 1147 crusade led against these people by Henry the Lion devastated Pomerania and seized Lubeck, a major trading center and the former Obotrite capital.
A nominally Christian faction of these people historically allied with the Holy Roman Empire in its conflict with the Danes. Following Otto II's defeat at the Battle of Stilo in Calabria, the Obotrites under Mstivoj launched a 986 uprising against the Empire aimed at overthrowing the imperial 'marks' in the territory of these people, who are also called the Lutici. That uprising successfully delayed Christianization, a process that was essentially complete in 1168 when Valdemar the Great of Denmark sacked Arkona on Rugen and tore down the shrine of Svantevit, the chief diety of the subset of these people known as the Rani. Earlier, an 1147 crusade led against these people by Henry the Lion devastated Pomerania and seized Lubeck, a major trading center and the former Obotrite capital. For 10 points, name these people with a major center at Rethra who lived east of the Saxon Line in contemporary north-east Germany, the western branch of the Slavs.
A nominally Christian faction of these people historically allied with the Holy Roman Empire in its conflict with the Danes.
Wends (accept word forms; accept West Slavs before "Slavs" are mentioned and "Lutici" before that name is given; prompt on "Slavs" before they are mentioned)