At about the time of Samo's realm, Bulgar leader Kubrat of the Dulo clan led a successful uprising to end Avar authority over the Pannonian Plain, establishing Old Great Bulgaria, or Patria Onoguria, "the homeland of Onogurs". The civil war, possibly a succession struggle in Onoguria between the Kutrigurs under Alciocus on one side and Utigur forces on the other, raged from 631 to 632. After Alciocus fled to Bavaria, the power of the Avars' Kutrigur forces was shattered, and Kubrat established peace between the Avars and Byzantium in 632. According to Constantine VII's 10th century work De Administrando Imperio, a group of Croats who had separated from the White Croats in White Croatia had also fought against the Avars, after which they organized the Duchy of Croatia. The Unknown Archon's people from Samo's realm were also resettled at this time.
At about the time of Samo's realm, Bulgar leader Kubrat of the Dulo clan led a successful uprising to end Avar authority over the Pannonian Plain, establishing Old Gre,at ,Bulgaria, or Patria Onoguria "the homeland of Onogurs". The civil war, possibly a succession struggle in Onoguria between the Kutrigurs under Alciocus on one side and Utigur forces on the other, raged from 631 to 632. After Alciocus fled to Bavaria, the power of the Avars' Kutrigur forces was shattered, and Kubrat established peace between the Avars and Byzantium in 632. According to Constantine VII's 10th century work De Administrando Imperio, a group of Croats who had separated from the White Croats in White Croatia had also fought ag.ainst the Avars after which they organized the Duchy of Croatia The Unknown Archon's people from Samo's realm were also resettled at this time.