1917, Allies, artillery, Battle of Arras, Battle of Messines, Belgium, Brazil, British Empire, Canada, casualties, France, Germany, Great Britain, Imperial German Navy, Lens, Mediterranean, prisoners of war, Royal Navy, SM UC-34, Souchez, SS Cameronian, submarine, United States of America, weapons, Wytschaete, Ypres
Canadian attack south of the Souchez River and progress south of Lens; violent artillery fire on the West front, particularly in the Wytschaete section, south of Ypres. French summary of Allied spring offensive; over 52,000 prisoners, including over 1,000 officers, 446 heavy and field guns, and 1,000 machine-guns, taken. British transport Cameronian sunk by submarine in Eastern Mediterranean, with loss of 63 lives. Brazilian president signs decree revoking Brazil’s neutrality in war between Germany and United States, and authorizes taking over of German ships interned in Brazilian ports.