Page "Arnulf of Carinthia" Paragraph 4

When, in 882, Engelschalk II rebelled against the Margrave of Pannonia, Aribo, and ignited the so-called Wilhelminer War, Arnulf supported him and even accepted his and his brother's homage.

This ruined Arnulf's relationship with his uncle the Emperor and put him at war with Svatopluk of Moravia.

Pannonia was invaded, but Arnulf refused to give up the young Wilhelminers.

Arnulf did not make peace with Svatopluk until late 885, by which time the Moravian was a man of the emperor.

Some scholars see this war as destroying Arnulf's hopes at succeeding Charles.