Hephthalite Empire
The Hephthalites were a strong military power but they lacked the organization to fight on multiple fronts. The Sasanians and the First Turkic Khaganate made an alliance and in 557 launched a two pronged attack on the Hephthalites, taking advantage of their disorganization and disunity. The Hephthalite Empire was destroyed after the battle of Gol-Zarriun, and broke into several minor kingdoms around the Oxus. The Hephthalite king Ghadfar and what was left of his men fled southward to Sasanian territory, where they took refuge. Meanwhile, the Turkic Khagan Sinjibu reached an agreement with the Hephthalite nobility, and appointed Faghanish, the ruler of Chaghaniyan, as the new Hephthalite king.