Ypres east of the town. The first gas attack occurred against Canadian, British, and French soldiers, including both metropolitan French soldiers as well as Senegalese and Algerian tirailleurs (light infantry) from French Africa. The gas used was chlorine. Mustard gas, also called Yperite from the name of this town, was also used for the first time near Ypres, in the autumn of 1917. Of the battles, the largest, best-known, and most costly in human suffering was the Third Battle of Ypres (31 July to 6 November 1917, also known as the Battle of Passchendaele), in which the British, Canadian, ANZAC, and
Battle of Monastir (1917) Battle of Monastir (1917) The Battle of Monastir (1917) was a failed French attack against German-Bulgarian fortifications North and West of Monastir, between March 12 and May 26, 1917 during the Salonika Campaign in World War I. The battle, or, better said, series of operations, is known under several names. In French it is known as "Bataille de la cote 1248" (Battle of Hill 1248) and "Bataille de Pelister" (or Péristéri) after the Pelister mountain. In Bulgarian it is known as the "Battle of Chervena Stena", after the Chervena Stena or Crvena Stena ridge, also in the Pelister mountain range.