According to a legend recorded in the 10th-century De Administrando Imperio, the Croats came to their present region under the leadership of five brothers (called Kloukas, Lobelos, Kosentzis, Mouchlo, and Chrobatos) and of two sisters (called Touga and Bouga), and successfully fought and expelled the Pannonian Avars influence in the Roman province of Dalmatia.
The areas of modern-day Croatia located in the Pannonian plain had also been settled by Slavic tribes in the early Middle Ages, and history recorded some of their rulers.
The common chronology of the dukes and kings of Croatia was conceptualized by Franjo Rački and Ferdo Šišić, but although generally accepted, has several controversial claims about the 9th and 10th century line of Trpimirović dynasty.
This is confirmed by epigraphic inscription mentioning the earliest known Croatian queen (regina) Domaslava dated to first half of 10th century.
From 1102, the reigning King of Hungary was also the ruler of the Kingdom of Croatia in agreement with the Croatian nobles (see Pacta conventa).
Maria Ludovica of Modena (m.1808-d.1816) Caroline Augusta of Bavaria (m.1816) After the World War I and the breakup of Austria-Hungary, Croatia joined a newly formed State of Slovenes, Croats and Serbs as declared in the Zagreb Resolution (1918).
Under the Agreement was again elected Croatian Parliament (sabor) and a crown-appointed ban would decide internal matters in Croatia.
On September 10, 1943 Independent State of Croatia declared that the Treaties of Rome were null and void and annexed the portion of Dalmatia that had been ceded to Italy.