By May 14, 1968, was serving as a private first class in Company E, 4th Battalion, 47th Infantry Regiment, 9th Infantry Division.

In 1953, he commanded the First Battalion, 32nd Infantry Regiment, 7th Infantry Division.

That fall, the regiment was inactivated and re-designated 1st Battalion, 23rd Infantry Regiment, 2nd Infantry Division.

By September 13, 1943, he was serving as a private with the 142nd Infantry Regiment 36th Infantry Division in southern Italy.

By September 9, 1943 he was serving as a Sergeant in the 142nd Infantry Regiment, 36th Infantry Division.

The 290th Infantry Regiment, 75th Infantry Division was involved in the Battle of the Bulge.

McGowan was promoted to Sergeant Major of the 114th Infantry Regiment, 29th Infantry Division in 1918.

He was assigned to Company B, 22nd Infantry Regiment, 4th Infantry Division.

He was sent to Korea in March 1951 and served as a private first class with Company C, 23rd Infantry Regiment, 2nd Infantry Division.

By March 31, 1945 he was serving as a private first class in Company L, 128th Infantry Regiment, 32nd Infantry Division.

By May 14, 1968, was serving as a private first class in Company E, 4th Battalion, 47th Infantry Regiment, 9th Infantry Division.

In 1953, he commanded the First Battalion, 32nd Infantry Regiment, 7th Infantry Division.

That fall, the regiment was inactivated and re-designated 1st Battalion, 23rd Infantry Regiment, 2nd Infantry Division.

By September 13, 1943, he was serving as a private with the 142nd Infantry Regiment 36th Infantry Division in southern Italy.

By September 9, 1943 he was serving as a Sergeant in the 142nd Infantry Regiment, 36th Infantry Division.

The 290th Infantry Regiment, 75th Infantry Division was involved in the Battle of the Bulge.

McGowan was promoted to Sergeant Major of the 114th Infantry Regiment, 29th Infantry Division in 1918.

He was assigned to Company B, 22nd Infantry Regiment, 4th Infantry Division.

He was sent to Korea in March 1951 and served as a private first class with Company C, 23rd Infantry Regiment, 2nd Infantry Division.

By March 31, 1945 he was serving as a private first class in Company L, 128th Infantry Regiment, 32nd Infantry Division.