Frank Steer (January 12, 1901 - March 7, 2006) was, at age 105, one of the last surviving American veterans of the First World War.
 Steer joined the United States Army at age 17 in 1918.
 He was sent to France in July 1918, and served on the Western Front against the Germans.
 Steer saw action at the battle of the Meuse-Argonne Offensive.
 After the war, he stayed in the army and served in the Second World War as a major appointed Provost Marshal of Hawaii during its period under martial law.
 Among his duties was the oversight of the prostitutes who serviced visiting soldiers and sailors.
 Steer eventually retired from service in 1945 as a colonel after serving 27 years.
 He served in both world wars and was therefore an honorary soldier of the United States Army.
 In 1959, Steer moved to Hawaii after it had become a part of the Union, and lived there for the rest of his life.
 He died at age 105.
The Meuse-Argonne Offensive, also known as the Maas-Argonne Offensive and the Battle of the Argonne Forest, was a major part of the final Allied offensive of World War I that stretched along the entire Western Front.
 It was fought from 26 September 1918 until the Armistice of 11 November 1918, a total of 47 days.
 The Meuse-Argonne Offensive was the largest in United States military history, involving 1.2 million American soldiers.
 It was one of a series of Allied attacks known as the Hundred Days Offensive, which brought the war to an end.
 The battle cost 28,000 German lives and 26,277 American lives.
 It was the largest and bloodiest operation of World War I for the American Expeditionary Force (AEF), which was commanded by General John J. Pershing, and one of the deadliest battles in American history.
 American losses were exacerbated by the inexperience of many of the troops, and tactics used during the early phases of the operation.
The 3d Pursuit Group was a United States Army Air Service unit that fought on the Western Front during World War I as part of the First United States Army.
 Formed in France in July 1918, the group was assigned to the 1st Pursuit Wing and saw action in the final months of the war, supporting the Battle of Saint-Mihiel and the Meuse-Argonne Offensive.
 Following the end of the war, the group was demobilized in France on 10 April 1919.
 There is no modern United States Air Force unit that shares its lineage and history.
The Korean War (in South Korean Hangul: 한국전쟁 ; Hanja: 韓國戰爭 ; RR: "Hanguk Jeonjaeng " , "Korean War"; in North Korean Chosŏn'gŭl: 조국해방전쟁 ; Hancha: 祖國解放戰爭 ; MR: "Choguk haebang chǒnjaeng " , "Fatherland Liberation War"; 25 June 1950 – 27 July 1953) was a war between North Korea (with the support of China and the Soviet Union) and South Korea (with the principal support of the United States).
 The war began on 25 June 1950 when North Korea invaded South Korea.
 The United Nations, with the United States as the principal force, came to the aid of South Korea.
 China came to the aid of North Korea, and the Soviet Union also gave some assistance to the North.
The Battle of Hoengsong was a battle during the Korean War.
 It took place between 11–15 February 1951.
 As part of the renewed Chinese assault on the UN strongholds in Korea, it was the first part of the CPVA Fourth Phase Offensive, and was fought between the Chinese and United Nations forces.
 The Chinese were victorious in this battle, having inflicted heavy casualties to the UNC forces in the two days of fighting.
 South Korean soldiers were ordered to lead the assault and the U.S. were ordered to support them, not lead the assault this time.
 Unfortunately, after the Chinese offensive began, retreating South Korean soldiers streamed south past U.S. support forces, allowing the Chinese to flank American positions.
 Soon, the Chinese owned the narrow, twisting valley north of Hoengsong and the road that ran through it, the only escape route.
 Hundreds of U.S. soldiers including field artillerymen, infantry, and logistics soldiers were killed by Chinese forces, resulting in one of the most lopsided defeats suffered by the U.S. military in the Korean War.
The Battle of Canal du Nord was part of a general Allied offensive against German positions on the Western Front during the Hundred Days Offensive of World War I.
 The battle took place in the Nord-Pas-de-Calais region of France, along an incomplete portion of the Canal du Nord and on the outskirts of Cambrai between 27 September and 1 October 1918.
 To avoid the risk of having extensive German reserves massed against a single Allied attack, the assault along the Canal du Nord was undertaken as part of a number of closely sequenced Allied attacks at separate points along the Western Front.
 It began one day after the Meuse-Argonne Offensive, one day before an offensive in the Flanders region of Belgium and two days before the Battle of St. Quentin Canal.
Grace D. Banker (October 25, 1892 – September 17, 1960) was a telephone operator who served during World War I (1917–1918) as Chief Operator of mobile for the American Expeditionary Forces (AEF) in the U.S. Army Signal Corps.
 She led thirty-three women telephone operators known popularity as Hello Girls.
 They were assigned in New York to travel to France to operate telephone switch boards at the war front in Paris, and at Chaumont, Haute-Marne.
 They also operated the telephone switch boards at First Army headquarters at Ligny-en-Barrois, about 5 mi to the south of Saint-Mihiel, and later during the Meuse-Argonne Offensive.
 After her return to civilian life, Banker and her team members were treated as citizen volunteers and initially not given recognition as members of the military.
 In 1919, Banker was honoured with the Distinguished Service Medal for her services with the First Army headquarters during the St. Mihiel and Meuse-Argonne Offensives, with a commendation.
Hart Goodloe (January 31, 1875 - March 21, 1954) was a surgeon in the First World War who served at Saint-Mihiel and the Meuse-Argonne Offensive.
 Hart Goodloe was born in Danville, Kentucky in 1875.
 He is a graduate of University of Louisville's School of Medicine and a member of Phi Chi Medical Fraternity's Alpha Alpha-Gamma Chapter serving as Grand Presiding Senior (President) of the Grand Chapter from 1900 to 1901.
 On August 13, 1917 he enlisted in the U.S. Army at age 42.
 He was commissioned to the rank of major and was a surgeon in the army.
 By 1918 he was sent over to France and saw action at the Battle of Saint-Mihiel and Meuse-Argonne Offensive.
 He was discharged from service on March 18, 1919, and resided in St. Louis, Missouri.
 His war documents were destroyed in a fire at the St. Louis archives.
 He died at Veterans Hospital, Biloxi, Mississippi, on March 21, 1954 at age 79.
Kang Kon (Chosŏn'gŭl: 강건 ; June 23, 1918 - September 8, 1950) was a Korean military leader active in Manchuria and the Korean peninsula during the years leading up to the Korean War and during the first stages of the Korean War in 1950.
 Kang (born Kang Shin-tae) was born in Sangju, Gyeongsangbuk-do, on June 23, 1918, and at the young age of 16 began his involvement in liberation and military ventures.
 As a teenager, he was actively involved in recruiting anti-Japanese guerrillas for his long-time friend, Kim Il Sung, and is remembered as being unusually tall and often towering over others.
 Before his leadership roles in the Korean War, Kang joined the anti-Japanese struggle in Manchuria in 1932, and later fled into Soviet territory in the early 1940s, where, by the end of World War II was an officer in the 88th Independent Brigade in the Red Army, consisting of both Korean and Chinese soldiers.
 Lieutenant General Kang led the North Korean Army offensive during the opening stages of the Korean War until he was killed by a land mine on September 8, 1950.
General Noël Marie Amédée Garnier-Duplessix (sometimes Duplessis) was a French army officer.
 Whilst still a colonel he commanded the 2nd Infantry Division in the Allied victory at the First Battle of the Marne before seeing service in the Zaian War in the French protectorate of Morocco.
 Garnier-Duplessix returned to France in October 1916 and received command of the 37th Infantry Division for the 15 December offensive of the Battle of Verdun and the Nivelle Offensive of April 1917.
 He received command of the 9th Army Corps in June 1918 and led that unit to victory in the August Battle of Amiens and the autumn Meuse-Argonne Offensive.
 After the war he was posted to Cilicia in the Franco-Turkish War of 1920-1 where he argued against early withdrawal of troops following the March 1921 Cilicia Peace Treaty.

Question: Which war took place first Korean War or The Meuse-Argonne Offensive ?
Answer: Meuse-Argonne Offensive