Infanterie-Regiment 66 fought in most of the great battles on the western front: Mons, Le Cateau, the Marne, Arras, the Somme, the French offensive on the Chemin des Dames, the Kaiserschlacht in March 1918, the German offensive on the Chemin des Dames, the Second Marne, the Siegfried Line. It continually demonstrated the highest levels of tactical skill. This is an exceptional text written by a soldier and academic, Dr. Otto Korfes, who served as an officer in the regiment and then became an historian in the Reichsarchiv, the repository of the German Army's Great War documents. Korfes consulted the regimental war diaries and after action reports, as well as making extensive use of first-hand accounts. Korfes was executed in 1944 for his participation in the Valkyrie plot against Hitler. It includes 23 tactical sketches and dozens of pencil drawings by the great German war artist, Dobrich-Streglitz. AUTHOR: Terence Zuber was a US Army infantry officer 1970-1990. He is the author of half a dozen books, including "The Battle of the Frontiers: Ardennes 1914" and "Ten Days in August." He lives in West Virginia. Otto Korfes was an officer in the 66th Infantry Regiment before becoming an historian. He was executed in 1944 for his participation in the Valkyrie plot against Hitler. 60 b/w illustrations