Annales regni Francorum
Radoslav or his son was the ruler of Serbia during the uprisings (819–822) of Ljudevit Posavski against the Franks. According to the Royal Frankish Annals, in 822, Ljudevit went from his seat in Sisak to the Serbs, somewhere in western Bosnia. Under the same entry, the "Royal Frankish Annals" state that Serbs were controlling a great part of Dalmatia ("ad Sorabos, quae natio magnam Dalmatiae partem obtinere dicitur") but according to John (Jr.) Fine, it was hard to find Serbs in this area since the Byzantine sources were limited to the southern coast, also it is possible that among other tribes exists tribe or group of small tribes of Serbs. However, the mentioning of "Dalmatia" in 822 and 833 as an old geographical term by the authors of Frankish Annals was "Pars pro toto" with a vague perception of what this geographical term actually referred to.