Emperor Yao
After the Yao family of Former Qin overthrew the previous ruler Fu Jian, the emperor Yao Xing made repeated pleas to the warlords of the Lü family to free Kumārajīva and send him east to Chang'an. When the Lü family would not free Kumārajīva from their hostage, an exasperated Yao Xing had armies dispatched to Liangzhou in order to defeat the warlords of the Lü family and to have Kumārajīva brought back to them. Finally the armies of Emperor Yao succeeded in defeating the Lü family, and Kumārajīva was brought east to the capital of Chang'an in 401 CE.