Tuul River
Although he was enthroned after his father's death in 581, soon his cousin Talopien (Mukan Khagan's son) rebelled claiming that Taspar willed the title to him. Another cousin Shetu (Issik Khagan's son) however supported Amrak. Amrak, being the least powerful of the three abandoned and renounced his title in favor of Shetu. In turn Shetu (regnal title Ishbara) declared him a lesser khagan in Tuul River valley (now in Mongolia).("See" Göktürk civil war)