The March of Pannonia was a frontier march

Marches

A march or mark refers to a border region similar to a frontier, such as the Welsh Marches, the borderland between England and Wales. During the Frankish Carolingian Dynasty, the word spread throughout Europe....

 of the Carolingian Empire

Carolingian Empire

Carolingian Empire is a historiographical term which has been used to refer to the realm of the Franks under the Carolingian dynasty in the Early Middle Ages. This dynasty is seen as the founders of France and Germany, and its beginning date is based on the crowning of Charlemagne, or Charles the...

 erected in the mid-ninth century against the threat of Great Moravia

Great Moravia

Great Moravia was a Slavic state that existed in Central Europe and lasted for nearly seventy years in the 9th century whose creators were the ancestors of the Czechs and Slovaks. It was a vassal state of the Germanic Frankish kingdom and paid an annual tribute to it. There is some controversy as...

 and lasting only as long as the strength of that state.

The Pannonian march succeeded the Avar march

Avar March

The Avar March was a frontier district established by Charlemagne against Avaria in the southeast of the Carolingian Empire.In the late 8th century, Charlemagne destroyed the Avar fortress called the Ring of the Avars and made the people tributary to him...

. It occupied the territory south of the Danube

Danube

The Danube is a river in the Central Europe and the Europe's second longest river after the Volga. It is classified as an international waterway....

 between the Enns River

Enns River

The Enns is a southern tributary of the Danube River, joining northward at Enns, Austria. The Enns River spans , in a flat-J-shape. It flows from its source near the towns of Gasthofalm and Flachau, generally eastward through Radstadt, Schladming, and Liezen, then turns north near Hieflau, to flow...

 and the Wienerwald

Wienerwald

The Vienna Woods are forested highlands that form the northeastern foothills of the Northern Limestone Alps in the states of Lower Austria and Vienna. The long and wide hill range is heavily wooded and a popular recreation area with the Viennese....

. It was referred to in some documents as terminum regni Baioariorum in Oriente or "the end of the kingdom of the Bavarians in the east" and from this is sometimes called the "(Bavarian) eastern march," a term more commonly used to refer to the later March of Austria

March of Austria

The March of Austria was created in 976 out of the territory that probably formed the earlier March of Pannonia. It is also called the Margraviate of Austria or the Bavarian Eastern March. In contemporary Latin, it was the marchia Austriae, Austrie marchionibus, or the marcha Orientalis...

, established in 976 as a sort of late successor state. The Pannonian march itself does not appear to have survived into the eleventh century.

Margraves

This list is incomplete.

• Radbod, until 856
• Carloman
  Carloman of Bavaria
  Carloman was the eldest son of Louis the German, king of East Francia , and Hemma, daughter of the count Welf...
  
  , 856–863
• William II
  William (marcha orientalis)
  William was the margrave of the March of Pannonia in the mid ninth century until his death on campaign against the Moravians in 871. In his day, the march orientalis corresponded to a front along the Danube from the Traungau to Szombathely and the Rába river and including the Vienna basin...
  
  , until 871
• Engelschalk I
  Engelschalk I
  Engelschalk I was the margrave of the March of Pannonia in the mid ninth century until his death on campaign against the Moravians in 871. In his day, the march orientalis corresponded to a front along the Danube from the Traungau to the Szombathely and Raba rivers and including the Vienna basin...
  
  , until 871
• Aribo
  Aribo of Austria
  Aribo was the margrave of the March of Pannonia, from 871 until his death...
  
  , 871–909
  • Engelschalk II
    Engelschalk II
    Engelschalk II was the margrave of the March of Pannonia in the late ninth century in opposition to Aribo...
    
    , son of Engelschalk I, in opposition to Aribo

Sources

• Reuter, Timothy
  Timothy Reuter
  Timothy Alan Reuter , grandson of the former mayor of Berlin Ernst Reuter, was a German-British historian who specialized in the study of medieval Germany, particularly the social, military and ecclesiastical institutions of the Ottonian and Salian periods .Reuter received his D.phil from Oxford in...
  
  . Germany in the Early Middle Ages 800–1056. New York: Longman, 1991.
• Foundation for Medieval Genealogy: Nobility of Austria.