"Nachtjagdgeschwader" 4 (NJG 4) was a Luftwaffe night fighter-wing of World War II.
 NJG 4 was formed on 18 April 1941 in Metz.
 The unit's objective was to counter RAF Bomber Command's strategic night-bombing offensive.
 The unit's commanding officers included Oberstleutnant Wolfgang Thimmig (October 1943 – November 1944) and Major Heinz-Wolfgang Schnaufer (20 November 1944 – 8 May 1945).
Simion Coman (born 1890, died 1971) was a Romanian Brigadier-General during World War II.
 In 1941, he started his career as Commanding Officer 3rd Dorobanti Infantry Regiment.
 he became Deputy General Officer Commanding 2nd Mountain Division in 1942, and Commanding 5th Instruction Center.
 In 1944, Coman served as General Officer Commanding 21st Training Division, Commanding Officer 3rd Frontier Brigade, and Deputy General Officer Commanding 4th Corps Area.
 He sent into reserve in 1946 and retired in 1947.
Gheorghe Cosma (born 1892, died 1969) was a Romanian Major-General during World War II.
 He began his career in 1940 as Chief of Staff Higher Technical Department.
 In 1941, he served as Commanding Officer 6th Artillery Regiment and Chief of Staff Higher Technical Department.
 He was Commanding Officer 9th Artillery Brigade in 1942, and in 1943 was Commanding Officer 13th Artillery Brigade and General Officer Commanding Artillery VII Corps.
 He became a prisoner of war in 1944, but that same year served as General Officer Commanding Artillery Mountain Corps.
 In 1945, he was General Officer Commanding Artillery 4th Army, General Officer Commanding 18th Division, General Officer Commanding 19th Division, and Commandant Artillery Instruction Center.
 Cosma went into reserve in 1945 and retired in 1947.
Heinz-Wolfgang Schnaufer (16 February 1922 – 15 July 1950) was a German "Luftwaffe" night-fighter pilot and the highest-scoring night fighter ace in the history of aerial warfare.
 A flying ace is a military aviator credited with shooting down five or more enemy aircraft during combat.
 All Schnaufer's 121 victories were claimed during World War II, mostly against British four-engine bombers, for which he was awarded the Knight's Cross of the Iron Cross with Oak Leaves, Swords and Diamonds, Germany's highest military decoration at the time, on 16 October 1944.
 He was nicknamed "The Spook of St. Trond", from the location of his unit's base in occupied Belgium.
Radu Baldescu (born 1888, died 1953) was a Romanian Lieutenant-General during World War II.
 He began his military career in 1936 as Commanding Officer 93rd Infantry Regiment.
 In 1937, he became Commandant Sibiu Officers School.
 In 1940, he first became Commanding Officer 16th Brigade and then Deputy General Officer Commanding 18th Division.
 He was Deputy General Officer Commanding 18th Division in 1941 and General Officer Commanding 18th Division in 1942.
 Baldescu went into reserve in 1944, but later that year became Deputy General Officer Commanding 6th Corps Area.
 In 1945, he started as General Officer Commanding 5th Corps Area and then became General Officer Commanding VI Corps.
 Baldescu went into reserve again from 1946 to 1947, and retired in 1947.
 In 1951, he was arrested.
Petre Camenita (1889-1962) was a Romanian Major-General during World War II.
 In 1941, he was first Commanding Officer 1st Frontier Brigade and then Deputy General Officer Commanding 21st Division.
 He was Commanding Officer Infantry 1st Guards Division and then Secretary-General to Under-Secretary of State of Land Forces in 1942, and in 1944 became General Officer Commanding 18th Division.
 In 1945, he was first General Officer Commanding 18th Division and then General Officer Commanding VI Corps.
 Camenita retired in 1945.
Constantion Badescu (1892–1962) was a Romanian brigadier-general during World War II.
 He served as commanding officer, 1st Dorobanti Infantry Regiment in 1941, but was called into reserve the following year.
 He retired in 1943, but was recalled in 1944 and served as commanding officer, 11th Brigade.
 In 1945, He first served as general officer commanding 11th Division, then commanding officer 11th Brigade, and finally general officer commanding 11th Division again.
 He retired in 1947.
Marin Ceausu (1891-1954) was a Romanian Brigadier-General during World War II.
 He served as Commanding Officer 14th Artillery Regiment beginning in 1939, and was Commanding Officer Artillery 2nd Division and at disposition for I Corps in 1942.
 In 1943, he was General Officer Commanding Artillery IV Corps.
 In 1944, he was General Officer Commanding Artillery V Corps.
 Finally, in 1945, he served as General Officer Commanding 21st Division.
 Ceausu went into reserve in 1946, and retired in 1947.
Mihail Corbuleanu (born 1894, died 1974) was a Romanian Major-General during World War II.
 He began his military career Military Attaché to Rome in 1940.
 In 1944 he was briefly in reserve, but then became General Officer Commanding 13th Training Division, Commanding Officer 18th Brigade, General Officer Commanding 6th Division, and again became Commanding Officer 18th Brigade.
 He was General Officer Commanding 18th Division, but went into reserve that year and retired in 1947.
Lieutenant General Heisuke Abe (阿部 平輔 , Abe Heisuke , 1886–1943) was a senior officer in the Imperial Japanese Army during World War II.
 He was the Commandant of Cadets at the Komamoto Army Training School between 1934 and 1936, before being posted as the Commanding Officer Noncommissioned Officer Candidates Kwantung Army.
 He was the Commanding Officer of the 20th Depot Division when war broke out and was the Commanding Officer of the 41st Division in New Guinea in 1942.
 He died of illness, presumed to be Dracunculiasis at Wewak in September 1943.

Question: In what conflict was Heinz-Wolfgang Schnaufer a commanding officer of a night fighter-wing?
Answer: World War II