Decade of 880s
880: The Serbs expand their Kingdom southwards after the Byzantines have to rellocate most of their military forces from the Balkans to Anatolia, in order to stop the advances of the Arabs there.
881: A military alliance of anti-Danish Wessex factions and Mercia is defeated in Middlessex. The Danes start the final conquest of these two Anglo-Saxon kingdoms.
882: Jaroslaw of Silesia and his noblemen convert to Christianism. He accepts the overlordship of Emperor Bernard III in exchange of protection against the Pagan Slavs. Thus, Silesia becomes the third semi-independent Kingdom under Imperial overlordship, along with Saxony and Gothia.
883: The Magyars push the Bulgars to advance south of the Danube, with little Byzantine opposition.
884: The remaining Danes in Jutland and Frisia evacuate these lands in order to settle in the new Danish Kingdom of Great Britain. Thus, Saxony completes the annexation of Jutland and recovers control over Frisia.
885: Rise of the Kingdom of Norway, which controls the western Danish realms disconnected from the new Danish powerhouse in Britain.
886: Creation of the first regular Diet in Pavia. The Emperor creates new duchies by splitting Burgundy, Avaria, Moravia, Bavaria and the Middle Francia.
887: After an internal uprising, the Saracens of Sicily achieve independence from the Caliphate, creating the free Emirate of Sicily. However, they lose control over Apulia, which is recovered by the Empire with Byzantine assistance.
888: The Danes, assisted from Britain, expand their dominions through West Francia, but they are defeated when trying to reach the city of Paris.
889: The Saxons conquer Rania after a brief war. Louis II of Saxony reaches his top in territorial power.