What is the meaning of HMM?

(Military) HMM stands for Marine medium helicopter squadron
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.
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APAMilitary Dictionary (DoD). (2011). hmm. Retrieved September 21, 2026, from http://smartdefine.org/hmm/definitions/1956070
ChicagoMilitary Dictionary (DoD). 2011. "hmm" http://smartdefine.org/hmm/definitions/1956070 (accessed September 21, 2026).
HarvardMilitary Dictionary (DoD) 2011, hmm, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/hmm/definitions/1956070>.
MLAMilitary Dictionary (DoD). "hmm" 4 April 2011. Web. 21 September 2026. <http://smartdefine.org/hmm/definitions/1956070>