George Andrew Davis Jr. (December 1, 1920 – February 10, 1952) was a highly decorated fighter pilot and flying ace of the United States Army Air Forces in World War II, and later of the US Air Force during the Korean War.
 Davis rose to the rank of major, and was promoted posthumously to lieutenant colonel and awarded the Medal of Honor for his actions in "MiG Alley" during the latter war.
 He was the only flying ace of the United States to be killed in action in Korea.
"Tenente" Leopoldo Eleuteri was a World War I flying ace credited with seven aerial victories.
Lago Leopoldo (Lake Leopold) is a body of water located in the Venezuelan Amazon in the western-most range of the Guiana Shield at .
 It measures about 320 m. (1050 ft) by and 240 m. (790 ft.) and up to 20 m. (65 ft.) deep.
 The water level was documented at 384 m. (1258 ft) above sea level but may have diminished in recent years.
 Its name derives from the expedition that King Leopold III of the Belgians made in 1953 which motored up the Sipapo, Autana and Umaj-Ajé rivers and set camp several miles from the lake.
 There is no firm evidence that members of King Leopold expedition actually reached the lake.
 Lago Leopoldo was first seen from the air as a landmark near the Cerro Autana tepui during the 1950s.
 The lake was first visited by helicopter in March 1973 by the Spanish naturalist Félix Rodríguez de la Fuente.
 The following April, the terrestrial route from the original King Leopold III camp was established by a Venezuelan expedition which reached the shores of the lake on April 18, 1973.
 Lago Leopoldo figures prominently in the oral history and lore of the native Piaroans where it is referred as “Paraka-Wachoe” or the lake in the mountains.
 Lago Leopoldo now renamed Lago Autana has been included as a natural monument within a protected area which includes the Cerro Autana and adjacent lands.
Captain Konstantin Konstantinovich Vakulovsky (born 28 October 1894, died Summer 1918) was a World War I flying ace credited with six aerial victories.
 A major general's son, he volunteered for aviation duty on 8 August 1914, six days after graduating from university.
 He taught himself to fly, and became one of Russia's first military pilots on 13 June 1915.
 After escaping the fall of the Novogeorgievsk Fortress in a hazardous flight, Vakylovsky flew reconnaissance missions, some through heavy ground fire.
 Given command of the newly formed First Fighter Detachment, he became a flying ace credited with six aerial victories.
 He died in a flying accident during Summer 1918.
Egmont Prinz zur Lippe-Weißenfeld (14 July 1918 – 12 March 1944) was a "Luftwaffe" night fighter flying ace of royal descent during World War II.
 A flying ace or fighter ace is a military aviator credited with shooting down five or more enemy aircraft during aerial combat.
 Prinz zur Lippe-Weißenfeld was credited with 51 aerial victories, all of them claimed in nocturnal combat missions.
World War I (WWI or WW1), also known as the First World War, the Great War, or the War to End All Wars, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918.
 More than 70 million military personnel, including 60 million Europeans, were mobilised in one of the largest wars in history.
 Over nine million combatants and seven million civilians died as a result of the war (including the victims of a number of genocides), a casualty rate exacerbated by the belligerents' technological and industrial sophistication, and the tactical stalemate caused by gruelling trench warfare.
 It was one of the deadliest conflicts in history, and paved the way for major political changes, including revolutions in many of the nations involved.
 Unresolved rivalries still extant at the end of the conflict contributed to the start of the Second World War only twenty-one years later.
Emil Lang (14 January 1909 – 3 September 1944), nicknamed "Bully", was a "Luftwaffe" flying ace during World War II.
 A flying ace or fighter ace is a military aviator credited with shooting down five or more enemy aircraft during aerial combat.
 Lang was credited with 173 aerial victories—144 on the Eastern Front, 29 on the Western Front—and one Soviet torpedo boat sunk in 403 combat missions.
Joachim Kirschner (7 June 1920 – 17 December 1943) was a German World War II Luftwaffe 188 victories flying ace.
 A flying ace or fighter ace is a military aviator credited with shooting down five or more enemy aircraft during aerial combat.
 He was also a recipient of the Knight's Cross of the Iron Cross with Oak Leaves.
 The Knight's Cross of the Iron Cross and its higher grade Oak Leaves was awarded to recognise extreme battlefield bravery or successful military leadership.
Adolf Dickfeld (20 February 1910 – 17 May 2009) was a World War II Luftwaffe officer and 136 victories Flying ace.
 A flying ace or fighter ace is a military aviator credited with shooting down five or more enemy aircraft during aerial combat.
 He was also a recipient of the Knight's Cross of the Iron Cross with Oak Leaves (German: "Ritterkreuz des Eisernen Kreuzes mit Eichenlaub" ).
 The Knight's Cross of the Iron Cross and its higher grade Oak Leaves was awarded to recognise extreme battlefield bravery or successful military leadership.
Richard Pearman Minifie, (2 February 1898 – 31 March 1969) was an Australian fighter pilot and flying ace of the First World War.
 Born in Victoria, he attended Melbourne Church of England Grammar School.
 Travelling to the United Kingdom, he enlisted in the Royal Naval Air Service in June 1916.
 Accepted for flight training, he completed his instruction in December and joined No. 1 (Naval) Squadron RNAS on the Western Front in January 1917, flying Sopwith Triplanes.
 He went on to score seventeen aerial victories on this type of machine throughout the year, becoming both the youngest Australian flying ace of the First World War and No. 1 (Naval) Squadron's highest-scoring ace on the Triplane.
 The unit re-equipped with the Sopwith Camel late in 1917, with Minifie going on to achieve a further four victories on the aircraft, raising his final tally to a score of twenty-one aircraft shot down.

Question: Leopoldo Eleuteri was a flying ace in which deadliest conflct in history?
Answer: World War I