26 May 1917: George V changes surname from Saxe-Coburg-Gotha to Windsor (Royal
proclamation on 17 July)
Jul 1917: Battle of Passchendaele
7 Nov 1917: 'October' Revolution in Russia
6 Dec 1917: Halifax (Nova Scotia) Explosion, one of the world's largest artificial non-nuclear
explosions to date: a ship loaded with wartime explosives blew up after a collision,
obliterating buildings and structures within two square kilometres of the explosion