[1] Poppo, a Popponid (Elder House of Babenberg), was the younger brother of Henry of Franconia.
[3] In that year, the Daleminzi, Bohemians, and Sorbs threatened to invade Thuringia and burn the German-allied Slav districts.
Poppo's subsequent expedition against them is recorded in three different variations in the three different manuscript traditions of the Annales Fuldenses.
[5] In the previous year, he and the Thuringii had been defeated under Egino in a war that they had instigated with Saxons[6] In 883, he again fought his brother Egino, who was recorded as a co-duke of the Thuringii, and was defeated savagely and forced to retreat with only a few men.
[8] According to Regino of Prüm, Poppo had advised Arn, Bishop of Würzburg, to undertake the expedition against the Slavs on which he was killed earlier that year.