《史记·三十世家·绛侯周勃世家》
周勃以将军的身份随从高祖征讨反叛汉朝的燕王臧荼，在易县城下把他们打败。
以将军从高帝反者燕王臧荼，破之易下。
Zhou Bo, as a general, followed Gaozu to quell the King of Yan, Zang Tu, who had rebelled against the Han Dynasty. They defeated them at the foot of Yixian City.