settlers from the entire Roman Empire settled among the Illyrians, and Roman soldiers were encouraged to retire in the region.
The land was originally part of Illyria up until the Roman occupation. Following the split of the Roman Empire between 337 and 395 AD, Dalmatia and Pannonia became parts of the Western Roman Empire. Some claim that the region was conquered by the Ostrogoths in 455 AD. It subsequently changed hands between the Alans and the Huns. By the 6th century, Emperor Justinian had reconquered the area for the Byzantine Empire. The Illyrians were conquered by the Avars in the 6th century.
However, the Illyrians did not entirely vanish from Bosnia and Herzegovina with the arrival of new cultures. A large part of the remaining Illyrian culture intermingled with those of new settlers, some of it is believed to have been adopted by the latter, and some survived up to date, such as architectural remains ( e.g.Daorson in Ošanići near Stolac), certain customs and traditions (e.g.tatooing, the 'gluha kola' dances, the 'ganga' singing, zig-zag and concentric circles in traditional decorations), place names (e.g. Čapljina, from 'čaplja', a south Slavic word for 'heron', coincides with 'Ardea', a Latin word for 'heron', and 'Ardea', in turn, bears striking similarity with the name of Ardiaei, the native Illyrian people of the wider Neretva valley region, where the town of Čapljina is situated), etc.
Medieval Bosnia
Modern knowledge of the political situation in the west Balkans into the region in the late 9th century. The Slavic tribes also brought their mythology and pagan system of beliefs, the Rodovjerje. In particular, Perun / Перун, the highest god of the pantheon and the god of thunder and lightning is also commonly found in Bosnian toponymy, for instance in the name of Mount Perun (Perunova Gora / Перунова Гора). Along with the Slavic settlers, the native Illyrians were Christianized. Bosnia and
