Officer (armed forces)
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An officer is a person who holds a position of authority as a member of an armed force or uniformed service.
A British commissioned officer and warrant officer in Afghanistan.
The Royal Navy officer training academy Britannia Royal Naval College at Dartmouth
Newly commissioned U.S. Navy and Marine Corps officers celebrate their new positions by throwing their midshipmen covers into the air as part of the U.S. Naval Academy class of 2005 graduation and commissioning ceremony.
A platoon from the Australian 29th Battalion being addressed by their officer commanding in August 1918
Sergeant
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Sergeant (Sgt) is a rank in use by the armed forces of many countries. It is also a police rank in some police services. The alternative spelling, serjeant, is used in The Rifles and other units that draw their heritage from the British light infantry. Its origin is the Latin serviens, 'one who serves', through the Old French term serjant.
UK Police Patrol Sergeant Epaulette