July – King Otto I besieges the fortress of Eresburg. He defeats his half-brother Thankmar and kills him as he tries to find sanctuary. Eberhard III, duke of Franconia, is banished and replaced by his uncle Berthold.
Fall – Otto I defeats in two campaigns a series of uprisings in Saxony, Franconia and Lotharingia. He signs a "friendship pact" with King Louis IV ("d'Outremer") of the West Frankish Kingdom.