Khan Kubrat {Kurt, Hor Bat or Kuvrat} was born around 585-600 AD. He was of the Dulo clan, from the Unogondurs tribe of Bulgars. In 632 Khan KUBRAT unites politically all Bulgarians and their akin tribes of the Azov and the Caspian sea. In the struggle against the Western Turkic people their khans are forced to recognize the supreme power of KUBRAT and this act practically marks the foundation of GREAT BULGARIA a.k.a. Bulgaria Magna.
The Byzantine chroniclers Teophan and Niciphorus write that Kubrat bequeathed to his sons the principle of preserving unity - “In order for them to rule everywhere and not be slaves to other people.”
There is a legend saying that as the Khan was dying, he ordered his sons to fetch a bundle of sticks and told them to break the bundle in two. When none of the sons managed to break the bundle, the Khan took the sticks and broke them one by one with his feeble hands.
The sons understood their father's message: their strength depended on their unity. The Byzantine chroniclers Theophanes and Nicephorus wrote that Kubrat's bequest to his sons was to preserve the unity, "so that they would dominate everywhere and never become other peoples' slaves".
We can only estimate when Kubrat was born, but we know that as a child his uncle Organa sent him to study in Byzantine. After Kubrat’s death (around 668) his five sons ( Batbayan, Asparukh, Kotrag, Altsek and Kuber) had to decide what to do. Staying together meant that only one would get to be the great Khan. They didn’t listen to their father’s advice.Thus they decided to separate and seek their fortunes independently. They split the Bulgars into five hordes which was a big mistake. In less than five years the Khazars defeated the Bulgarian country after conquering its main territories.