John was born on October 27th, 1921 in Youngstown, Mahoning County, Ohio.
His father was John Joseph Costello Sr. His mother was Margaret Steinbaugh.
John had 2 brothers Roy F. Costello (who also was in the war) &
Thomas Costello and a sister Agnes Costello.
He attendend Westminister Maryland College, it was also a military training place.
John was enlisted on 07-08-1942 at Ft. Hayes Columbus Ohio.
He was assigned to the 335th infantry regiment, 84th infantry division.
They where know as the Railspitters. He was in F-Company.
He was awarded the Bronze star and Purple heart.
He died on December 1st 1944. When his foxhole was hit by a mortar attack.
He was KIA between Beeck and Leiffarth, Germany.
His body was never recovered. He is listed on the Wall of the Missing.