Hugo Stoltzenberg for the first time on the Western Front. The first gas attack occurred against Canadian soldiers and also against a force of mostly colonial soldiers from French Africa known as French colonial troops. The gas used was Chlorine gas. Mustard gas, also called Yperite from the name of this city, was also used for the first time near Ypres in the autumn of 1917. Prior to that, Stoltzenberg had injured his eye in an incident involving a chlorine gas cylinder which exploded and blinded him in the left eye. After the end of World War I, Stoltzenberg participated in clearing
Battle of Arras (1917) the Western Front, in Operation Alberich. By the spring of 1917, the German army in the west had a strategic reserve of "Experience of the German 1st Army in the Somme Battles", ("Erfahrungen der I Armee in der Sommeschlacht") was published on 30 January 1917 by Ludendorff but new defensive methods were controversial. During the Battle of the Somme in 1916 Colonel Fritz von Loßberg (Chief of Staff of the 1st Army) had been able to establish a line of "relief" divisions (), with the reinforcements from Verdun, which began to arrive in greater numbers in September. In his analysis