myrmidon
Concise Oxford English Dictionary © 2008 Oxford University Press:
myrmidon /ˈməːmɪd(ə)n/
▶noun a follower or subordinate of a powerful person, especially one who is unscrupulous.
– origin ME: from L. Myrmidones (pl.), from Gk Murmidones, a warlike people of Thessaly who accompanied Achilles to Troy.
'myrmidon' also found in these Oxford entries:

