Generally, it is "officers" and "enlisted" in the US military - "enlisted persons" is a relic of the misguided 'politically correct' movement and is not used. Actually, enlisted is the generic term and, when referring to specific individuals, one would use a branch-specific term, such as soldiers, sailors, airmen (yes, it's airMEN) and Marines. Marine gets capitalized - its important to them. There is also a set of ranks that is in-between - warrants or warrant officers.   I seem to recall from someplace that the British army refers to senior noncommissioned officers, such as the regimental sergeant major, as a warrant. The US military reserves the term for specialists.