Complex sentence: The MiG-17 was the primary interceptor of the fledgling Vietnam People's Air Force in 1965, scoring its first aerial victories and seeing extensive combat during the Vietnam War, the aircraft frequently worked in conjunction with MiG-21s and MiG-19s.
Split into simpler sentences: The MiG-17 was the primary interceptor of the fledgling Vietnam People's Air Force in 1965, scoring its first aerial victories and seeing extensive combat during the Vietnam War. The aircraft frequently worked in conjunction with MiG-21s and MiG-19s.