WW1 By Felipe Sales Period: 1914 to 1918 WW1 Jul 28, 1914 War was declared against Serbia by Austria-Hungary Aug 23, 1914 Japan declared war against Germany 1915 Italy joined the Allied forces 1915 Germans introduced poison gas into the war May 7, 1915 A British passenger ship was sunk 1917 Planes started being used in war They were used to drop bombs and artillery on enemy soldiers and equipment. 1917 Russia decides to step way from the war Apr 6, 1917 The US joins the war 1918 2nd battle of Somme 1918 Wilson's points he had 14 Nov 11, 1918 The war has concluded Germany signs a truce, they have to pay great debts.
They were used to drop bombs and artillery on enemy soldiers and equipment.
Germany signs a truce, they have to pay great debts.
