John Gerhard Linkowski was born in June 22, 1919 in Buffalo, New York. He had one brother. John was educated at the Immaculate Heart of Mary School in Buffalo. He later worked as an air conditioning technician. According to government records, John at some point resided in Chester County.
John joined the Army in 1938 and served in Panama. During World War II, he served with an artillery unit and saw action in France and Germany. He was called to serve overseas again during the Korean War as a heavy weapons infantryman.
The American Battle Monuments site records:
Master Sergeant Linkowski was a member of Company M, 3rd Battalion, 8th Cavalry Regiment, 1st Cavalry Division. He was listed as Missing in Action while fighting the enemy near Unsan, North Korea on November 2, 1950. He was presumed dead on December 31, 1953. For his leadership and valor, Master Sergeant Linkowski was awarded the Bronze Star with Oak Leaf Cluster, the Purple Heart, the Combat Infantryman's Badge, the Korean Service Medal, the United Nations Service Medal, the National Defense Service Medal and the Korean War Service Medal.