What is the rank abbreviation for Sergeant Major?

The abbreviation for the rank of Sergeant Major is SGM. This abbreviation is widely recognized and used within military and law enforcement contexts to denote this specific rank. The "S" in SGM stands for "Sergeant," while "G" represents "Major," indicating a senior non-commissioned officer (NCO) who typically serves in leadership roles that involve oversight and management of troops.

Understanding rank abbreviations is crucial in military operations and communications, as these acronyms convey specific hierarchies and responsibilities within the organizational structure. The other choices represent different ranks: SGT stands for Sergeant, SFC stands for Sergeant First Class, and SM could be misleading as it does not officially correspond to a recognized rank in this context. Hence, SGM accurately captures the rank of Sergeant Major.