{adv. phr.} Not out of one's own desire or one's own free will; obligatorily; not freely. * /"So you were a Nazi prison guard? " the judge asked. "Yes, your Honor," the man answered, "but I was acting under orders and not because I wished to harm anyone."/
UNDER ORDERS
Meaning of UNDER ORDERS in English
Dictionary of English idioms . Словарь английских идиом. 2012