成軍

lit. to form an army / to set up (team, group, band, organization etc) / to found / opening (ceremony) / to commission (arms system, naval vessel) / to graduate from an apprenticeship

surname Cheng

to succeed / to finish / to complete / to accomplish / to become / to turn into / to be all right / OK! / one tenth

(bound form) army / military

(of troops) to be utterly routed and dispersed

utterly defeated

The army is completely routed. (idiom)