《汉书·传·卫青霍去病传》
军到边塞，天子派使者捧着大将军印，就在军中任命车骑将军卫青担任大将军，诸将都把部队归大将军统率，大将军建立官号而归。
至塞，天子使使者持大将军印，即军中拜青为大将军，诸将皆以兵属，立号而归。
When the army reached the frontier, the emperor sent an envoy to hold the seal of the Grand General, and appointed Wei Qing, the General of the Charioteers and Cavalry, as the Grand General in the army. All the generals put their troops under the command of the Grand General, and the Grand General established the official title and returned.