Большой русско-английский фразеологический словарь
Ч132
ЗАЩИЩАТЬ ЧЕСТЬ МУНДИРАusu.disapprovVPsubj:humanto uphold (sometimes through unscrupulous means) the reputation of some organization, one's departmental interestsetc: X будет защищать честь мундира = X will defend (uphold) the honor of the companyX will protect the good name of his company (organizationetc).