Myrmidon

Part of speech: noun (n.)

1. One of a fierce tribe or troop who accompained Achilles, their king, to the Trojan war.

2. A soldier or a subordinate civil officer who executes cruel orders of a superior without protest or pity; -- sometimes applied to bailiffs, constables, etc. Thackeray. With unabated ardor the vindictive man of law and his myrmidons pressed forward. W. H. Ainsworth.