Complex sentence: In October 1940, the USAAC felt a need for long-range fighters more than attack bombers, sixty of the production run of A- 20s were converted to P-70 night fighters, all delivered by September 1942.
Split into simpler sentences: In October 1940, the USAAC felt a need for long-range fighters more than attack bombers. As a result, sixty of the production run of A- 20s were converted to P-70 night fighters, all delivered by September 1942.