"Iron Mike" was born on 2 Feb 1894 in Newark, Delaware. Died on 27 March 75 at 81 years of age in San Diego, Arizona. He had a long and illustrious Army career, enlisting in 1913 and retiring in 1955. He saw combat in both world wars and the Korean War, most famously as commander of the 3rd Infantry Division during the invasion of Southern France. through WW2.
His sone, John Jr., was KIA during Operation Market Garden in September 1944 while serving with the 505th Parachute Infantry Regiment, 82nd Airborne Division in Mook, Netherlands.
His brother, Lieut James Allison O'Daniel , was KIA during WW1 while serving in the Army Air Service.

From Find a Grave:
John graduated from high school at Oxford, Pennsylvania in 1912 and attended Delaware College in Newark, Delaware, where he played varsity football and earned the nickname "Mike".
He enlisted in the Delaware National Guard in 1913 with Company E, 1st Delaware Infantry. On July 19, 1916 he was mobilized, and served as a corporal and sergeant with the First Infantry at the Mexico border in Deming, New Mexico. He was honorably discharged from service on his 23rd birthday, February 15, 1917 and returned to Delaware College as a student. After graduation from Delaware College in 1917 he was commissioned as a second lieutenant into the Infantry Branch of the United States Army Reserve on August 15 at Reserve Officers Training Camp at Fort Myer, Virginia. He received his regular commission on October 26 and was assigned to the 11th Infantry Regiment, part of the 5th Division, at Camp Forrest, Tennessee.
World War I :
In May 1918 he shipped out for overseas duty, serving on the Western Front as part of the American Expeditionary Force (AEF), commanded by General John Pershing. He was originally serving as a platoon commander in Company 'K' of the 3rd Battalion, 11th Infantry Regiment, before taking over command of the company when his company commander, Captain Mark W. Clark, was promoted to command the battalion.
Sadly his younger brother, 1Lt. James Allison O'Daniel, died in the " Line Of Duty " due to an accident in France on July 27, 1918. " O'Daniel " then participated in the Battle of Saint-Mihiel and later in the Meuse-Argonne Offensive. He was wounded at St. Mihiel on September 12, 1918.
Testifying to his endurance and aggressiveness in battle was his nickname, " Iron Mike ", awarded by his peers, said to be a result of his actions at St. Mihiel, where he fought for twelve hours, even though he was hit in the face by a German machine gun bullet and severely wounded. He was awarded the Distinguished Service Cross, the nation's second highest award for valor, for his actions, as well as the Purple Heart.
After the war ended, on November 11, 1918 at 11:00am, he returned with the regiment to the United States in September 1919 and was later transferred to the 25th Infantry Regiment at Camp Stephen D. Little at Nogales, Arizona.
World War II : In January 1941, during World War II (although the United States was still neutral), he became commander of the 2nd Battalion, 24th Infantry Regiment at Fort Benning with which he participated in the Third Army maneuvers in Louisiana–a critical test of logistical and combat capabilities for the later fighting in World War II. At the onset of the American entry into World War II, in December 1941, he was promoted to colonel and became Assistant Chief of Staff for operations of the Third Army and Director of the Junior Officers Training Center in San Antonio, Texas. In June 1942 he was named Operations Officer of the Amphibious Training Center at Camp Edwards, Massachusetts.
In July 1942 O'Daniel was transferred to Allied Forces Headquarters (AFHQ) in Europe as Commander of the American Invasion Training School in the United Kingdom. In September he assumed command of the 168th Infantry Regiment, part of the 34th Infantry Division, a National Guard formation under Major General Charles W. Ryder, leading it in the Allied invasion of French North Africa (Operation Torch), and led the regiment on November 8–9, 1942 in the capture of Algiers and the subsequent run for Tunis. He was also rewarded with a promotion to the one-star general officer rank of brigadier general, on November 20. In December, he was assigned by Lieutenant General Mark W. Clark (who had served with O'Daniel in the 11th Infantry in World War I) to organize the U.S. Fifth Army Invasion Training Center in North Africa which trained the forces for future amphibious landings.
In July 1943 O'Daniel landed in Sicily (Operation Husky) with the 3rd Infantry Division. On July 24, 1943, two weeks after the initial landings, he returned to Algiers and was attached to the 36th Infantry Division, another National Guard formation, recruiting from Texas, under the command of Major General Fred L. Walker, for the Salerno landings (Operation Avalanche) in September. Although not required to do so, he chose to land with the troops at Salerno. He became officer in charge of amphibious operations for the Fifth Army on October 1, 1943 and the following month was reassigned as the assistant division commander (ADC) of the 3rd Infantry Division, commanded by Major General Lucian Truscott. The division crossed the Volturno Line and advanced up the spine of Italy until being held up by the formidable German Winter Line (also known as the Gustav Line) defenses. The division, after spearheading the Fifth Army's advance and had seen much hard fighting and heavy casualties, was withdrawn for rest in November. He took part in the landings at Anzio (Operation Shingle) in January 1944. Operation Shingle was an amphibious assault around the Italian town of Anzio in an attempt to outflank the Gustav Line and capture the Italian capital of Rome. In February O'Daniel assumed command of the 3rd Infantry Division from Major General Truscott, who was promoted to the command of VI Corps from Major General John P. Lucas, while still on the beachhead. While under his command the division repelled several furious German counterattacks, finally breaking out of the beachhead encirclement in May during Operation Diadem and driving to Rome, where he was promoted to the two-star rank of major general. He was also awarded the Army Distinguished Service Medal for his service in Italy.
Much publicized, if not completely reported, was the comment he made at a staff meeting in response to a question from British General Sir Harold R. L. G. Alexander, Commander-in-Chief (C-in-C) of the Allied Armies in Italy (later redesignated the 15th Army Group). "I believe your division did not give an inch", asked General Alexander. "Is that true?" The reply from O'Daniel was "Not a God-damned inch."
He served there until August 1944 when O'Daniel and his 3rd Division landed at the St. Tropez Peninsula in Southern France and drove north through the Vosges Mountains to Germany. O'Daniel led the 3rd Division up the Rhône Valley to Strasbourg, in the Colmar Pocket where it decimated German forces in January 1945 and when it smashed across the Siegfried Line at Zweibrücken in March 1945. He frequently flew over the front lines in a light airplane dropping notes to the troops below, exhorting them to advance. He led the division across the River Rhine and participated in the capture of the Nazi citadel at Nuremberg on April 20, 1945 after ruthless house to house fighting. O'Daniel hoisted his flag over Adolf Hitler Square in the center of the city and paid a rousing tribute to the exhausted infantrymen around him for having "driven the hun" from one of the last remaining Nazi strongholds.
Just before noon on April 20, 1945–Adolf Hitler's birthday–the 2nd Battalion of the 30th Infantry Regiment reached the Adolf Hitler Platz in the center of the town after taking its ground in a building-to-building fight. The street markers in the square were replaced by others bearing the name "Eiserner Michael Platz" (Iron Mike Square) in honor of the 3rd Division's CG, Major General John W. O'Daniel, who was known to his intimate friends and to thousands of Marnemen as "Iron Mike."
At 18:30, in the battered Adolf Hitler Platz, a rifle platoon from each regiment, as well as tanks, TDs, and Flak wagons, stood in silent array. Old Glory ascended an improvised flagpole and the band played the National Anthem. Major General John W. O'Daniel then spoke. "Again the 3d Division has taken its objective," he said. "We are standing at the site of the stronghold of Nazi resistance in our zone. Through your feats of arms, you have smashed fifty heavy antiaircraft guns, captured four thousand prisoners, and driven the Hun from every house and every castle and bunker in our part of Nuremberg.
"I congratulate you upon your superior performance. . .
The band broke into "Dogface Soldier." A few bewildered civilians contemplated the red, white, and blue banner flying at half-staff in mourning for President Franklin D. Roosevelt.
The 3rd Infantry Division went on to conquer Augsburg, Munich, and Salzburg. It ended the war with the capture of Berchtesgaden, Hitler's mountain stronghold in May 1945. Representatives of German Generalfeldmarschall Albert Kesselring surrendered to him and he turned them over to General Jacob L. Devers, commander of the 6th Army Group, near Munich on May 5, 1945. One of O'Daniel's proudest trophies from the war was a pair of Hermann Göring's trousers. He called them "a lot of pants". At war's end it was reported that O'Daniel's "Rock of the Marne" 3rd Division had been awarded one fourth of all Medals of Honor presented during the war for its feats in North Africa, Sicily, Italy, France and Germany.
In July 1945, O'Daniel was assigned temporary duty with Army Ground Forces Headquarters in Washington, D.C.. Later that month he became the commandant of the U.S. Army Infantry School at Fort Benning, Georgia, and in November 1946 was also appointed Commanding General there.
Cold War and later military career :
O'Daniel was soon in the midst of the Cold War. He was named Military Attaché at Moscow Russia in June 1948 and after temporary duty with the Intelligence Division at Army headquarters, assumed that position the following September, serving until August 1950 when he was appointed Infantry Inspector in the Office of the Chief of Army Field Forces at Fort Monroe, Virginia. He once recalled that it was the only time he ever wore all of his military decorations he had received, "to dazzle the Russians who were impressed with his medals." After returning from Moscow he made news when he wrote a lengthy magazine article about his experience and was quoted as saying, "For all its advertised glory, Moscow first impressed me, and still does, as a vast slum." The Soviet newspaper Pravda responded by accusing him of being a spy and a liar. In July 1951, he went to Korea to command I Corps (United States), U.S. 8th Army for his last combat assignment. During his service in Korea, he was awarded the Air Medal for meritorious achievement on flights from July 21 to August 14, 1951 and the Commendation Ribbon for meritorious achievement on July 18, 1951. O'Daniel gained an appreciation for the use of airpower saying "The airlift to Korea is one of the greatest developments of this war. It gives a commander advantages he never had in wars before." He pinned on his third star on December 20, 1951.
On September 1, 1952, O'Daniel became commanding general of U.S. Army Forces Pacific returning once again to Fort Schafter, Hawaii.
In April 1954, at the behest of President Eisenhower, he was posted as the Chief of the Military Assistance Advisory Group for Indo-China, leading the vanguard of America's involvement in Indochina. America was seeking to bolster wavering French resolve against Communist aggression. O'Daniel took a voluntary drop in rank so he would not outrank the French commander at that time. His appointment was somewhat controversial because some viewed him as not having the requisite tact and sophistication. Eisenhower defended him, believing that his critics underestimated him. "Despite his nickname and his tough exterior", Eisenhower wrote, "General O'Daniel was a man of great ability and tact". He had been chosen for the assignment largely on the basis of his successful role in creating and supervising the training programs which had transformed the South Korean Army into an effective fighting force during the Korean War. Eventually, he came to lead the 342-man group tasked with building South Vietnam's defense forces, as permitted by the Geneva Accord.
He was optimistic that with American help Communism in Southeast Asia could be held at bay. He recommended an increased American presence as France disengaged from the area. His advice was taken, and he proceeded with 350 additional men to train and equip a more competent and professional South Vietnamese military. "Iron Mike" became a forceful advocate of the U.S. commitment to South Vietnam, calling it "a test of our guts and our resilience." At the end of 1955, he passed his command to Lt. Gen. Samuel Tankersley Williams. A monument to O'Daniel was erected at Quang Trung, about ten miles west of Saigon, the site of the largest training camp in the country at the time. After the service: O'Daniel retired from active service on December 31, 1955. At his retirement ceremony General Maxwell Taylor, the U.S. Army Chief of Staff, paid a personal tribute during a Pentagon ceremony. Commenting that "'Iron Mike' always gets his objective", General Taylor told the story of how O'Daniel captured Berchtesgaden in May 1945. Racing down one side of the Autobahn and finally putting his forces across the single available bridge, O'Daniel's men won the spirited race to the prized objective from the soldiers of the 101st Airborne Division. General Taylor had been in command of the 101st at the time. O'Daniel was awarded a third oak leaf cluster to his Distinguished Service Medal at the ceremony.
Decorations: His military decorations include the French Croix de Guerre, the British Order of the Bath, the Italian Medaglia d'Argento al Valore Militare, the Distinguished Service Cross, the Army Distinguished Service Medal with three Oak Leaf Clusters, the Silver Star with Oak Leaf Cluster, the Legion of Merit with three Oak Leaf Clusters, the Bronze Star with three Oak Leaf Clusters, and the Purple Heart.
He was given Delaware's highest civilian medal, the Governor's Medal as well as the Conspicuous Service Cross of Delaware. He was awarded an honorary PhD from the University of Delaware in 1956.
Distinguished Service Cross U.S. Army Distinguished Service Medal ribbon.svg Army Distinguished Service Medal with three Oak Leaf Clusters Silver Star Medal ribbon.svg Silver Star with Oak Leaf Cluster Legion of Merit ribbon.svg Legion of Merit with three Oak Leaf Clusters Bronze Star Medal ribbon.svg Bronze Star with three Oak Leaf Clusters Purple Heart ribbon.svg Purple Heart Croix de Guerre 1939-1945 ribbon.svg Croix de guerre 1939-1945; Order of the Bath UK ribbon; Order of the Bath; Valor militare silver medal; Silver Medal of Military Valor
Later life:
After returning from South Vietnam and retiring, he was chairman of a civilian group called American Friends of Vietnam, demonstrating his personal commitment to the Vietnamese people.
He attended a reunion in Newark at the University of Delaware also attended by retired Marine Corps Lieutenant General Robert T. Pepper, and General Julian C. Smith in 1967. O'Daniel sent his alma mater a portrait given to him by Ngo Dinh Diem, the first president of South Vietnam. The Middletown Transcript recorded his last visit to Delaware on Nov 28 1971: "Lt. Gen. John W. "Iron Mike" O'Daniel, World War II hero, returned to Newark to settle the estate of his aunt Miss Etta J. Wilson."
A 1945 oil portrait of O'Daniel by Stanley Arthurs hangs in Alumni Hall at the University of Delaware.
He died in San Diego on March 27, 1975, survived by his wife Gretchen, a daughter, Mrs. Ruth Snyder of Pacific Grove California, and four grandchildren. His first wife, Ruth died in 1965. His only son, John W. O'Daniel Jr., a paratrooper, was killed in action in World War II, near Arnhem in September 1944 during Operation Market Garden, while serving in the 505th Parachute Infantry Regiment, part of Major General James Gavin's 82nd Airborne Division. A brother, J. Allison O'Daniel, was killed in an air crash while serving in World War

Source: find A GRAVE