Myrmidon

1. n. A soldier or a subordinate civil officer who executes cruel orders of a superior without protest or pity; — sometimes applied to bailiffs, constables, etc.
2. n. One of a fierce tribe or troop who accompained Achilles, their king, to the Trojan war.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.