Li Guang
Ao later partook in Wei Qing's many campaigns against the Xiongnu. For instance, he led 15,000 cavalry in one of the early campaigns but he failed to engage the Huns after travelling a distance of 2,000 li. Two years later, he was again part of another campaign led by Li Guang, proceeding from Yanmen with 10,000 cavalry and 30,000 infantry. During the offensives at Yanmen in 129 BC, he and Li Guang were heavily defeated by the Xiongnu. They were charged with treason. The Chinese also regarded both capture and defeat the same so Li Guang and Ao were both sentenced to death. However, they were allowed to buy off their death sentence and became commoners.