Krum gets annighlated eliminating the disaster at the pass. Following victory Avar begin rading roman territority, lead to invasion and the Avars get their asses handed to them and the region falls under roman control. Have revolts break out in calpite like otl weakening it severly. Meanwhile in Italy have the romans sieze the oppurtunitywhen the fransk are kicking the Lombards to also atack them, probably a frank-roman allaince works best. Once that happens Southern Italy falls back into roman hands. Have the shia uprisings fail to take egypt and so you have the fatiimid berbers based in Africa, and conflict over sicily epts int war. Leads to a successfull roman campaign and the egyptions wont help since Berbers are shia. Wallah lot more focus in the west for the Romans.