Born 9 April 1921 in Bexar County, Texas to Cylburn Mattfeldt (1893 - 1978) and Lucille P Mattfeldt (1890-1970). Awarded a DSC on 14 April, he was posthumously awarded a Silver Star two weeks later: On an assault on the city of Egar, Czechoslovakia on 25 April 1945, Lieutenant Mattfeldt, commanding a platoon of machine guns attached to the leading elements of the assault forces, came under heavy enemy fire from two nearby strong points. Putting his gun into operation, Lieutenant Mattfeldt forced the withdrawal of the enemy troops and continued the advance across a ravine in the face of enemy machine gun fire for a distance of 75 yards. He entered the city with the first troops and encountered heavy fire which halted the advance. Fearlessly moving ahead of the riflemen, Lieutenant Mattfeldt placed heavy fire on the enemy while moving down a fire swept street. Deploying his guns at an important intersection Lieutenant Mattfeldt was killed by a sudden burst of fire from concealed enemy positions.