World War II Medal of Honor Recipient. He received the award from US Army Brigadier General Egmont F. Koenig at the 137th General Hospital, Ellesmere, Shropshire, England, on May 29, 1945 for his actions as a private with the 2nd Squad, 2nd Platoon, Company G, 2nd Battalion, 318th Infantry, 80th Infantry Division, US Army, on December 25, 1945, at the Battle of the Bulge, near Chaumont, Belgium. He joined the US Army in July 1943 and following his recruit and combat training, he was sent to the European Theater of Operations. On that day, during the Battle of the Bulge, he single-handedly charged across 40 yards (37 m) of open ground, destroyed two German machine gun emplacements and took six Germans prisoner. He was subsequently promoted to the rank of staff sergeant. Two months later, he was seriously wounded while crossing the Saar River by a mortar shell that blew up near him and he was subsequently evacuated to England for initial treatment. After the war, he returned to the US for further treatment, and attained the rank of master sergeant when he was discharged in 1948. During his military service, he was also awarded a Bronze Star and a Purple Heart. He then worked for a utility company in Baltimore, Maryland, retiring after 40 years of service. He died at the age of 90. His Medal of Honor citation reads: "He alone made it possible for his company to advance until its objective was seized. Company G had cleared a wooded area of snipers, and one platoon was advancing across an open clearing toward another wood when it was met by heavy machine-gun fire from two German positions dug in at the edge of the second wood. These positions were flanked by enemy riflemen. The platoon took cover behind a small ridge approximately 40 yards from the enemy position. There was no other available protection and the entire platoon was pinned down by the German fire. It was about noon and the day was clear, but the terrain extremely difficult due to a three-inch snowfall the night before over ice-covered ground. Pvt. Wiedorfer, realizing that the platoon advance could not continue until the two enemy machine-gun nests were destroyed, voluntarily charged alone across the slippery open ground with no protecting cover of any kind. Running in a crouched position, under a hail of enemy fire, he slipped and fell in the snow, but quickly rose and continued forward with the enemy concentrating automatic and small-arms fire on him as he advanced. Miraculously escaping injury, Pvt. Wiedorfer reached a point some 10 yards from the first machine-gun emplacement and hurled a hand grenade into it. With his rifle he killed the remaining Germans, and, without hesitation, wheeled to the right and attacked the second emplacement. One of the enemy was wounded by his fire and the other six immediately surrendered. This heroic action by one man enabled the platoon to advance from behind its protecting ridge and continue successfully to reach its objective. A few minutes later, when both the platoon leader and the platoon sergeant were wounded, Pvt. Wiedorfer assumed command of the platoon, leading it forward with inspired energy until the mission was accomplished."