- Second World War (1939-1945)
- 1st Lieutenant (Lieutenant)
- Medical Detachment, 2nd Battalion, 66th Armored Regiment, 2nd Armored Division "Hell On Wheels", U.S. Army (Medical Detachment, 2nd Battalion, 66th Armored Regiment, 2nd Armored Division "Hell on Wheels", U.S. Army)
Captain Mario T. De Felice, 0484759, Medical Corps, 66th Armored Regiment, 2nd Armored Division, United States Army, for extraordinary heroism in connection with military operations against the enemy. On 27 July 1944, during an attack near Le Mesnil Herman, France, Captain De Felice, a battalion surgeon, in order to evacuate the wounded, directed his half-track ambulance forward until it was almost completely surrounded by the enemy. While engaged in evacuating the wounded men, an enemy artillery barrage killed a first-aid man and wounded two infantrymen who were covering his movements. Captain De Felice, with complete disregard for his own personal safety, administered first aid to all the wounded men, without any assistance whatsoever, and loaded them into the ambulance. The extra extraordinary heroism and courageous actions of Captain De Felice reflect great credit upon himself and are in keeping with the highest traditions of the military service. Entered military service from from New Jersey.
Headquarters, Ninth U.S. Army, General Orders No. 49 (1944).