First major production version for the USAAF was the P-38E. It differed from the D-version in having a 37mm cannon with the 15round magazine replaced by a 20mm with 150 rounds. It also had a revised nose section with double the ammunition capacity of earlier versions, improved instrumentation and a revised hydraulic and electrical systems, and a SCR-274N radio. Operating in the Aleutians, the 54FS was the first unit to see combat in the Lightning, and the first kills scored by the P-38 were made by pilots in this unit.
1. P-38E, 54th FG, 343rd FS, Attu, Aleutian Islands, late 1943
2. P-38E, 54th FG, 343rd FS, Adak, Aleutian Islands, late 1942
3. P-38E, 54th FG, 343rd FS, Aleutian Island, spring 1943
4. P-38E, 54th FG, 343rd FS, Adak, Aleutian Islands, spring 1943
5. P-38E, 54th FG, 343rd FS, Adak, Aleutian Islands, spring 1943