The most widely produced American fighter jet of the war, the single-engine Republic P-47 "Thunderbolt" is discussed in this entry in the Famous Planes: WWII Fighters collection. More than 15,000 P-47s were built during the war, more than any other US fighter. Nicknamed the "Jug" for Juggernaut, it was considered one of the three top fighter planes of the USAAF. It was also the largest of the single engine fighters built during the war.