During the second World War, Eddie Kopsel was a member of the 442nd Night Fighter Squadron. He served as a radar intercept officer (R.I.O.) aboard a Northrop P-61 Black Widow. He achieved "ace" status with a total of 5 aerial kills, 4 in the E.T.O. and one in the Pacific. He shared the recognition of the first night kill of a German V-1 "Buzz Bomb" with pilot Lt. Herman E. Ernst flying out of a British airfield on July 16, 1944.
After the war, he was with the 3505th Training Wing stationed at Greenville A.F.B. in Mississippi and was transitioning to jet fighters. He was killed when the Lockheed T-33A Shooting Star he was in impacted the ground.