carry out a campaign without any justifiable reason; despatch troops (/send army out) without a righteous cause
? 國王～，不久就被打敗。The king sent out an army without a righteous cause,and it was routed very soon.
師出無名
dispatch troops without a just cause;do sth without a proper reason
師出無名shī chū wú mínɡ
指出動軍隊(duì)沒有正當(dāng)?shù)睦碛?。dispatch troops without just cause, act without any justifiable reason