Based on the chronicle of Simon Kézai and a folk legend from the land of the Székelys
When Attila died western nations were even more afraid than before: they feared his sons, for Attila had so many sons they could not be counted, they were like a nation themselves. Everyone thought that one of his sons would rule his empire.
But the cunning German princes stood on Aladár‘s side, because he was a descendant of Krimhilda, consort of the reigning prince. The Huns supported Csaba, who was the son of the Greek emperor’s daughter. Both sons began to rule, and it was the sword which finally decided the question. Csaba won the first battle. Upon hearing this Aladár sent a large army and attacked Csaba‘s people near Sicambria. The battle lasted for two whole weeks. Finally, Csaba‘s army was defeated and they scattered in so many directions, that only a few remained of Attila’s sons and the Hun people.
But in this battle, which the Huns called the ‘Battle of Krimhilda’, a lot of German lives was also lost. If the Germans were not so bashful and would speak honestly about it, they would have to mention how no one, neither man nor beast, could drink from the Danube for days, because the river overflowed with blood, from Sicambria all the way to the city of Potenciana.
Prince Csaba escaped from the battle and made his way to Greece with fifteen valiant Huns. He did not stay there long, however, but went back to his people, his father’s kin, to Scythia.
Three thousand Huns were left besides Csaba’s group, and they settled down in Csigle’s Meadow, but they were so afraid of the western people’s revenge that they didn’t call themselves Huns anymore, they called themselves Székelys, and moved to the easternmost region of the country. The Székely (sometimes called Szekler in English) people are descendents of the Huns, though their origin, unmixed blood, rigid customs and land are all very different from those of the Hungarians. The Székelys have not forgotten the Scythian alphabet and enjoy carving its letters into sticks.
As time passed the Hun warriors descended into their graves. In the time when their grandsons carried their weapons, a large army of neighboring peoples attacked them. The battle continued well into the night and the Székelys thought all was lost, when a miracle happened. An army of mounted warriors appeared riding down the Milky Way, led by Prince Csaba himself. The army of spirits led into battle by the valiant warrior from the sky swept the enemy away. They then silently followed the Milky Way, which the Székely people call the Triumphal March, back into the heavens.
And the Székely people continued to guard the eastern border. When they heard that the Hungarians had left Scythia with the intent of settling in Pannonia, they rushed to welcome them. The Hungarians were happy to see them too, and continued to entrust the guarding of the border to the Székelys.
(Adaptation by Dénes Lengyel)
Another theory, that of Scythian, Turkic and Avar kinship of ancient Hungarians, is supported primarily by archeologists and anthropologists.
Lajos Bartucz and Gusztáv Henkey proved Central Asian (Turanian, Pamyrian, Caspian, and Mongolian) and Caucasian origin (52.2% and 9.3% respectively) through extensive anthropological research (height, head size, physique, eye and hair color, etc.).
The theory of a dual conquest (Avar and Hungarian) was discussed in several volumes by Professor Gyula László, who supported his theory with archeological research. The Avars left their home in Central Asia during the second half of the sixth century and conquered a large area of present day Europe. During the time of Kagan Baján’s rule (562-601) their empire extended from the Lower Danube region to the Baltic Sea and from the Don River to the Alps. The ruler’s seat of power, the center of the empire, was in the Carpathian Basin in the territory of present day Hungary. The legend which follows is about this age.