Lutici
The Lutici (known by various spelling variants) were a federation of West Slavic Polabian tribes, who between the 10th and 12th centuries lived in what is now northeastern Germany. Four tribes made up the core of the federation: the Redarians (Redari, Redarii), Circipanians (Circipani), Kessinians (Kessini, Kycini, Chizzini) and Tollensians (Tholenzi). At least in part, the Lutici were a continuation of the Veleti. In contrast to the former and the neighboring peoples, the Lutici were not led by a Christian monarch or duke, rather power was asserted through consensus formed in central assemblies of the social elites, and the Lutici worshipped nature and several deities. The political and religious center was Radgosc (also referred to by several other names, e.g. Riedegost or Rethra).
The Lutici were first recorded by written sources in the context of the uprising of 983, by which they annilihated the rule of the Holy Roman Empire in the Billung and Northern Marches. Hostilities continued until 997. Thereafter, tensions with the empire eased, and in 1003 the Lutici entered an alliance with the emperor against duke Boleslaw I of Poland. However, by 1033 the alliance broke apart, and a German-Lutician war broke out that lasted until 1035, when the Lutici became tributaries of the empire again, but otherwise retained their independence. A civil war between the core tribes began the decline of the Lutici in 1056/57. The neighboring Obodrites intervened and subdued the northwestern faction.