British tank going into action, 10 April 1917.

The Mark II tank ‘Lusitania’ of the 1st Tank Brigade moves forward along a ruined street in Arras. Over 50 Mark IIs took part in the Battle of Arras and several were knocked out by German gunners firing armour-piercing machine gun ammunition. From an album of 76 official photographs. Photograph, World War One, Western Front (1914-1918), 1917.