Murphy's older sister helped him to falsify documentation about his birth date to meet the minimum-age requirement for enlisting in the military, and after being turned down by the Navy and the Marine Corps he enlisted in the Army. He first saw action in the Allied invasion of Sicily and the Battle of Anzio, and in 1944 was part of the liberation of Rome and invasion of southern France. Murphy fought at Montélimar, and led his men on a successful assault at the L'Omet quarry near Cleurie in northeastern France in October.
...Murphy received the Distinguished Service Cross for action taken on 15 August 1944, during the first wave of the Allied invasion of southern France. After landing on Yellow Beach near Ramatuelle, Murphy's platoon was attacked by German soldiers while making their way through a vineyard. He retrieved a machine gun that had been detached from the squad and returned fire at the German soldiers, killing two and wounding one. Two Germans exited a house about 100 yards (91 m) away and appeared to surrender; Murphy's best friend responded to them, and they shot and killed him. Murphy advanced alone on the house under direct fire. He wounded two, killed six, and took eleven prisoner.
Murphy was with the 1st Battalion, 15th Infantry Regiment during the 27–28 August offensive at Montélimar that secured the area from the Germans. Along with the other soldiers who took part in the action, he received the Presidential Unit Citation.
Murphy's first Purple Heart was for a heel wound received in a mortar shell blast on 15 September 1944 in northeastern France. His first Silver Star came after he killed four and wounded three at a German machine gun position on 2 October at L'Omet quarry in the Cleurie river valley. Three days later, Murphy crawled alone towards the Germans at L'Omet, carrying an SCR-536 radio and directing his men for an hour while the Germans fired directly at him. When his men finally took the hill, 15 Germans had been killed and 35 wounded. Murphy's actions earned him a Bronze Oak Leaf Cluster for his Silver Star. He was awarded a battlefield commission to second lieutenant on 14 October, which elevated him to platoon leader. While en route to Brouvelieures on 26 October, the 3rd Platoon of Company B was attacked by a German sniper group. Murphy captured two before being shot in the hip by a sniper; he returned fire and shot the sniper between the eyes. At the 3rd General Hospital at Aix-en-Provence, the removal of gangrene from the wound caused partial loss of his hip muscle and kept him out of combat until January. Murphy received his first Bronze Oak Leaf Cluster for his Purple Heart for this injury.
The Colmar Pocket, 850 square miles (2,200 km2) in the Vosges Mountains, had been held by German troops since November 1944. On 14 January 1945, Murphy rejoined his platoon, which had been moved to the Colmar area in December. He moved with the 3rd Division on 24 January to the town of Holtzwihr, where they met with a strong German counterattack. He was wounded in both legs, for which he received a second Bronze Oak Leaf Cluster for his Purple Heart. As the company awaited reinforcements on 26 January, he was made commander of Company B.
The Germans scored a direct hit on an M10 tank destroyer, setting it alight, forcing the crew to abandon it. Murphy ordered his men to retreat to positions in the woods, remaining alone at his post shooting his M1 carbine and directing artillery fire via his field telephone while the Germans aimed fire directly at his position. Murphy mounted the abandoned, burning tank destroyer and began firing its .50 caliber machine gun at the advancing Germans, killing a squad crawling through a ditch towards him. For an hour, Murphy stood on the tank destroyer returning German fire from foot soldiers and advancing tanks, killing or wounding 50 Germans. He sustained a leg wound during his stand, and stopped only after he ran out of ammunition. Murphy rejoined his men, disregarding his own wound, and led them back to repel the Germans. He insisted on remaining with his men while his wounds were treated. For his actions that day he was awarded the Medal of Honor. The 3rd Infantry Division was awarded the Presidential Unit Citation for its actions at the Colmar Pocket, giving Murphy a Bronze Oak Leaf Cluster for the emblem.
On 16 February, Murphy was promoted to first lieutenant and was awarded the Legion of Merit for his service 22 January 1944 – 18 February 1945. He was moved from the front lines to Regimental Headquarters and made a liaison officer.
The United States additionally honored Murphy's war contributions with the American Campaign Medal, the European–African–Middle Eastern Campaign Medal with arrowhead device and campaign stars, the World War II Victory Medal, and the Army of Occupation Medal with Germany Clasp. France recognized his service with the French Legion of Honor – Grade of Chevalier, the French Croix de guerre with Silver Star, the French Croix de guerre with Palm, the French Liberation Medal and the French Fourragère in Colors of the Croix de guerre, which was authorized for all members of the 3rd Infantry Division who fought in France during World War II. Belgium awarded Murphy the Belgian Croix de guerre with 1940 Palm.
Brigadier General Ralph B. Lovett and Lieutenant Colonel Hallet D. Edson recommended Murphy for the Medal of Honor. Near Salzburg, Austria on 2 June 1945, Lieutenant General A.M. Patch presented Murphy with the Medal of Honor and Legion of Merit for his actions at Holtzwihr. When asked after the war why he had seized the machine gun and taken on an entire company of German infantry, he replied, "They were killing my friends." Murphy received every U.S. military combat award for valor available from the U.S. Army for his World War II service.
Major Murphy, we thank you for your extraordinary service to our country. Rest in peace.