The part played in the Great War by the army of the Austro-Hungarian Dual Monarchy is little known to English-speakers, perhaps because the end of the war saw the complete destruction of the Empire. Yet it was of central importance, providing nearly all Central Powers forces on the Italian front, huge numbers on the Russian front, seven Army Corps in the Balkans – and even a little-known contingent in Turkey and Palestine. The first half of the story of this complex multi-national organization at war is described here in a concise but detailed text, supported by data tables and an insignia chart, and illustrated with rare photographs and colorful uniform plates.