The Pfalz Flugzeug Werke located at Speyer am Rhein in Bavaria was the third in the great triumvirate (along with Fokker & Albatros) of German fighter manufacturers in the Great War. When World War I broke out in 1914 Pfalz initially produced copies of the Morane-Saulnier parasol monoplanes for the German air service. With the advent of the famed Fokker Eindeckers with their synchronized machine guns Pfalz entered the fighter market with the Pfalz E.I & its successors all monoplanes which were similarly armed. Though never as as numerous as the Albatros or Fokker designs the D III/IIIa was flown in combat by many well-known aces: Werner Voss Carl Degelow Erich Lowenhardt & the balloon buster Fritz von Roth among others. This book examines the little-known aircraft flown by these incredible men.