Editing Arnulf of Carinthia (section)

===Regional ruler===
After Carloman was incapacitated by a stroke in 879, [[Louis the Younger]] inherited Bavaria, [[Charles the Fat]] was given the [[Kingdom of Italy (Holy Roman Empire)|Kingdom of Italy]], and Arnulf was confirmed in Carinthia by an agreement with Carloman. However, Bavaria was more or less ruled by Arnulf<ref>Reuter, Timothy (trans.) The Annals of Fulda. (Manchester Medieval series, Ninth-Century Histories, Volume II.) Manchester: Manchester University Press, 1992. 882 (p. 104 and n3)</ref> during the summer and autumn of 879 while his father arranged his succession. He was also granted "[[March of Pannonia|Pannonia]]," in the words of the ''[[Annales Fuldenses]]'',<ref>Reuter, Timothy (trans.) The Annals of Fulda. (Manchester Medieval series, Ninth-Century Histories, Volume II.) Manchester: Manchester University Press, 1992. 884 (pp. 108–111)</ref> or "Carantanum," in the words of [[Regino of Prüm]].<ref>MacLean, Simon. Kingship and Politics in the Late Ninth Century: Charles the Fat and the end of the Carolingian Empire. Cambridge University Press: 2003. p. 135</ref> The division of the realm was confirmed in 880 after Carloman's death.

When [[Engelschalk II]] of Pannonia in 882 rebelled against Margrave [[Aribo of Austria|Aribo]] and ignited the [[Wilhelminer War]], Arnulf supported him and accepted his and his brother's homage. This ruined Arnulf's relationship with his uncle, Emperor Charles the Fat, and put him at war with [[Svatopluk I of Moravia|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 ruler was loyal to the emperor. Some scholars see this war as destroying Arnulf's hopes of succeeding Charles the Fat.<ref name="Marshall2018">{{cite book|author=Henrietta Marshall|title=The Story of Germany|url=https://books.google.com/books?id=7rJ4DwAAQBAJ&pg=PT53|date=2018|publisher=Perennial Press|isbn=978-1-5312-6337-9|pages=53–}}</ref>