作戰失蹤

see 作戰失蹤人員|作战失踪人员[zuo4 zhan4 shi1 zong1 ren2 yuan2]

worker / workshop / (slang) troublesome / high-maintenance (person)

to do; to engage in / to write; to compose / to pretend; to feign / to regard as; to consider to be / to be; to act the part of / to feel (itchy, nauseous etc) / writings; works

combat / to fight

to fight / fight / war / battle

to lose / to miss / to fail

to be missing / to disappear / unaccounted for

footprint / trace / tracks

missing in action (MIA) (military)