Many Timochans fled to Transdanubia, later becoming part of the Lower Pannonian Principality. Omurtag decided to settle the matter by means of diplomacy in 824-826, though his letters were not replied to by Louis. This prompted Omurtag to undertake a boat campaign on the Drava in 827 and invade the lands of the Timočani at Sirmium, successfully imposing Bulgar rule again and appointing local governors.
Many Timochans fled to Transdanubia, later becoming part of the Lower Pannonian Principality. Omurtag decided to resolve the issue through diplomacy in 824-826, though his letters were unanswered by Louis. This prompted Omurtag to embark on a river campaign on the Drava in 827 and invade the lands of the Timočani at Sirmium, successfully imposing Bulgar rule again and appointing local governors.