In military terms, 4 Squadron, IV Squadron or 4th Squadron may refer to:
; Aviation squadrons :
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No. 4 Squadron RAAF
No. 4 Squadron is a Royal Australian Air Force squadron composed of the air force special forces Combat Controllers, aircrew who operate the Pilatus PC-21 aircraft and instructors for the Australian Defence Force Joint Terminal Attack Controlle ...
, a unit of the Royal Australian Air Force
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No. 4 Squadron (India), a unit of the Union of India Air Force
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No. 4 Squadron RNZAF
No. 4 Squadron RNZAF was a Royal New Zealand Air Force (RNZAF) patrol bomber unit that served in the South Pacific during World War II.
In the 1950s it also served as a Territorial Air Force unit flying Harvards and Mustangs from Taieri in Ot ...
, a unit of the Royal New Zealand Air Force
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4 Squadron SAAF, a unit of the South African Air Force
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No. IV Squadron RAF
No. 4 Squadron, normally written as IV Squadron, of the Royal Air Force operates the BAE Hawk T2 in the training role from RAF Valley.
History
Formation and First World War
IV Squadron formed at Farnborough in 1912 as part of the Royal F ...
, a unit of the United Kingdom Royal Air Force
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4th Aero Squadron, later 4th Squadron (Observation), 4th Observation Squadron, 4th Reconnaissance Squadron, a unit of the United States Air Corps
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4th Fighter Squadron (United States), a unit of the United States Air Force
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4th Space Control Squadron (United States), a unit of the United States Air Force
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4th Space Operations Squadron (United States), a unit of the United States Air Force
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HS-4
Helicopter Sea Combat Squadron Four (HSC-4) (previously Helicopter Anti-Submarine Squadron Four (HS-4)), also known as the Black Knights, is a multi-role combat helicopter squadron of the United States Navy based at Naval Air Station North Island w ...
(Helicopter Anti-Submarine Squadron 4), a unit of the United States Navy
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VMAQ-4
Marine Tactical Electronic Warfare Squadron 4 (VMAQ-4) was a United States Marine Corps electronic warfare squadron consisting of EA-6B Prowler jets. The squadron was last based at Marine Corps Air Station Cherry Point, North Carolina and fell und ...
(Marine Tactical Electronic Warfare Squadron 4), a unit of the United States Marine Corps
; Naval squadrons :
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4th Battle Squadron (United Kingdom), a formation of the United Kingdom Royal Navy
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Submarine Squadron 4 (United States)
Submarine Squadron 4 (also known as ''SUBRON 4'' or ''CSS-4'') was raised by the United States Navy in 1930. Since 9 July 1997, the squadron has been based at the Naval Submarine Base New London, Groton, Connecticut, United States of America.
Co ...
, a formation of the United States Navy
; Ground combat squadrons :
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2/4th Cavalry Commando Squadron (Australia), a unit of the Australian Army
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