Complex sentence: Promoted to captain, he decided to make the Air Force a career and was augmented into the Regular Air Force, and transitioned to the F-100 Super Sabre in 1957 while stationed at RAF Wethersfield.
Split into simpler sentences: Promoted to captain, he decided to make the Air Force a career and was augmented into the Regular Air Forcd. He then transitioned to the F-100 Super Sabre in 1957 while stationed at RAF Wethersfield.