Brown commenced his basic flight training in Fairchild PT-19s at Pine Bluff, Arkansas on 20 August 1941.
He then went to Randolph Field, Texas, for the second phase of his training.
The third and final phase was completed at Kelly Field, Texas, where he received his pilot's wings on 7 March 1942.
He officially transferred to the Air Corps on 4 April 1942, and was promoted to first lieutenant on 18 June 1942.
His first assignment after flight training was at Barksdale Field, Louisiana, where, as a member of the 344th Bombardment Squadron of the 93d Bombardment Group, he flew the Consolidated B-24 Liberator.
Moving with the organization to Fort Myers, Florida, he flew both antisubmarine patrol and conventional bomber training aircraft.


In August 1942, he flew with the 93d Bombardment Group to England, where it became the first B-24 group to join the Eighth Air Force.
He served in various positions with the group, including commander of the 329th Bombardment Squadron, group operations officer and group executive officer.
He was promoted to captain on 20 October, major on 13 February 1943, and lieutenant colonel on 27 August 1943.
High casualties and the rapid expansion of the Air Force paved the way for fast promotion, which Brown's superiors felt was deserved due to his outstanding performance in combat and leadership skills.
Perhaps no one was as surprised at his rapid advance in rank as his father, now a brigadier general, who was serving in North Africa at the time Brown arrived there with the 93d Bombardment Group when it was temporarily detached from the Eighth Air Force.
The elder Brown wanted to know "What's a young whippersnapper like you doing as a colonel?!"

It was as executive officer that he took part in Operation Tidal Wave, the low-level bombing raid against oil refineries at Ploieşti, Romania, on 1 August 1943.
The 93d Bombardment Group was the second of five B-24 groups that raided Ploieşti from a temporary base at Benghazi, Libya.
It flew directly into heavy defenses to attack  three of the six target refineries.
The lead plane, flown by the group commander, Lieutenant Colonel Addison Baker, was shot down.
Brown took over the command of the battered 93d and led it through the attack on the target and the journey back to Benghazi.
He received the Distinguished Service Cross for his actions on that mission.
For his services in combat in the skies over Europe, he was also awarded the Silver Star, two Distinguished Flying Crosses, three Air Medals, the French Croix de guerre with palm and the British Distinguished Flying Cross.

Brown was appointed assistant operations officer, 2d Air Division on 8 April 1944.
He was promoted to colonel on 1 October.
Having completed the required 25 missions, he was rotated back to the United States on 9 November.
Alice was shocked to discover "that guy of mine had in fact requested another overseas assignment.
He was so gung ho that he had come home, checked on me, and without my knowing it, put in to go back for another tour."
However, the Air Force turned down the request.
On 27 January 1945, Brown became Deputy Assistant Chief of Staff A-3 with the Air Training Command at Fort Worth, Texas.
Brown commenced his basic flight training in Fairchild PT-19s at Pine Bluff, Arkansas on 20 August 1941. He then went to Randolph Field, Texas, for the second phase of his training. The third and final phase was completed at Kelly Field, Texas, where he received his pilot's wings on 7 March 1942. He officially transferred to the Air Corps on 4 April 1942, and was promoted to first lieutenant on 18 June 1942. His first assignment after flight training was at Barksdale Field, Louisiana, where, as a member of the 344th Bombardment Squadron of the 93d Bombardment Group, he flew the Consolidated B-24 Liberator. Moving with the organization to Fort Myers, Florida, he flew both antisubmarine patrol and conventional bomber training aircraft.

In August 1942, he flew with the 93d Bombardment Group to England, where it became the first B-24 group to join the Eighth Air Force. He served in various positions with the group, including commander of the 329th Bombardment Squadron, group operations officer and group executive officer. He was promoted to captain on 20 October, major on 13 February 1943, and lieutenant colonel on 27 August 1943. High casualties and the rapid expansion of the Air Force paved the way for fast promotion, which Brown's superiors felt was deserved due to his outstanding performance in combat and leadership skills. Perhaps no one was as surprised at his rapid advance in rank as his father, now a brigadier general, who was serving in North Africa at the time Brown arrived there with the 93d Bombardment Group when it was temporarily detached from the Eighth Air Force. The elder Brown wanted to know "What's a young whippersnapper like you doing as a colonel?!"
It was as executive officer that he took part in Operation Tidal Wave, the low-level bombing raid against oil refineries at Ploieşti, Romania, on 1 August 1943. The 93d Bombardment Group was the second of five B-24 groups that raided Ploieşti from a temporary base at Benghazi, Libya. It flew directly into heavy defenses to attack  three of the six target refineries. The lead plane, flown by the group commander, Lieutenant Colonel Addison Baker, was shot down. Brown took over the command of the battered 93d and led it through the attack on the target and the journey back to Benghazi. He received the Distinguished Service Cross for his actions on that mission. For his services in combat in the skies over Europe, he was also awarded the Silver Star, two Distinguished Flying Crosses, three Air Medals, the French Croix de guerre with palm and the British Distinguished Flying Cross.
Brown was appointed assistant operations officer, 2d Air Division on 8 April 1944. He was promoted to colonel on 1 October. Having completed the required 25 missions, he was rotated back to the United States on 9 November. Alice was shocked to discover "that guy of mine had in fact requested another overseas assignment. He was so gung ho that he had come home, checked on me, and without my knowing it, put in to go back for another tour." However, the Air Force turned down the request. On 27 January 1945, Brown became Deputy Assistant Chief of Staff A-3 with the Air Training Command at Fort Worth, Texas.
George Scratchley Brown