- This article deals with the rank used in the MACOs and Marines. For a similarly named Starfleet rank, see lieutenant.
First lieutenant is an officer rank used by the MACOs and Federation Marines, superior to second lieutenant and subordinate to captain. Commonly, these officers are referred to as company officers for serving in the element of company. 1st Lieutenants commonly commands a platoon of approximately 30 marines, or serves as a company executive officer.
- MACO lieutenants did not appear in Star Trek: Enterprise to avoid audience confusion over rank names.
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