Francia or Frankia, also called the Kingdom of the Franks or Frankish Kingdom (Latin: regnum Francorum), Frankish Realm or occasionally Frankland, was the territory inhabited and ruled by the Franks from the 3rd to the 10th century. Under the nearly continuous campaigns of Charles Martel, Pepin the Short, and Charlemagne—father, son, grandson—the greatest expansion of the Frankish empire was secured by the early 9th century.

The tradition of dividing patrimonies among brothers meant that the Frankish realm was ruled, nominally, as one polity subdivided into several regna (kingdoms or subkingdoms). The geography and number of subkingdoms varied over time, but the particular term Francia came generally to refer to just one regnum, that of Austrasia, centred on the Rhine and Meuse rivers in northern Europe; even so, sometimes the term was used as well to encompass Neustria north of the Loire and west of the Seine. Eventually, the singular use of the name Francia shifted towards Paris, and settled on the region of the Seine basin surrounding Paris, which still today bears the name Île-de-France, and which region gave its name to the entire Kingdom of France.

Ljudevit Posavski (Trans-Savian) was a Croatian^{[dubious – discuss][citation needed]}Duke of Pannonian Croatia from 810 to 823. The capital of his realm was in Sisak. As the ruler of the Pannonian Slavs, he led an unsuccessful resistance to Frankish domination. He held close ties with the Carantanian and Carniolan tribes and with the Bulgarian tribe of Timočani, named after the Timok river. He is often regarded as a national hero in Croatian and Slovenian history.

In 818 Ljudevit sent his emissaries to Emperor Louis in Heristal. They described the horrors conducted by Cadolah and his men in Pannonia, but the King of Franks refused to make peace.

Ljudevit raised a rebellion against his Frankish rulers in 819 after he was seriously accused by the Frankish court. The Emperor Louis the Pious (814-840) sent Margrave Cadolah of Friuli (800-819) to quell the rebellion. The Frankish Frontier forces led by Cadolah have raided the land and tortured the population, most notably the children.

As the Pannonian Slavs were amassing forces, so did the Franks led by Cadolah return in 819. But the Frankish forces were soon defeated; and Cadolah himself had to retreat back to his home Friuli, where soon he died of disease.