myrmidon
noun
[ ˈməːmɪd(ə)n ]
• a follower or subordinate of a powerful person, typically one who is unscrupulous or carries out orders unquestioningly.
• "one of Hitler's myrmidons"
Origin:
late Middle English: from Latin Myrmidones (plural), from Greek Murmidones, a warlike Thessalian people who accompanied Achilles to Troy.