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, eventually becoming part of the Lower Pannonian Principality.  Omurtag attempted diplomacy with Louis in 824-826 but was unsuccessful. This led Omurtag to launch a river campaign on the Drava in 827 and invade the lands of the Timočani at Sirmium, successfully reasserting Bulgar rule and appointing local governors.