First World War By Paulita Ruiz 1914 German offensive against Belgium. Russian offensive against Prussia and Hidembury defeat the Russians in Tannenbry 1914 The French army stopped the German advance, while the western front stagnates in a war of trenches Period: Jun 28, 1914 to 1914 Murder of Francis Ferdinand archduke and his wife Jul 28, 1914 Autria-Hungria declares war on Serbia Period: Aug 1, 1914 to Aug 3, 1914 Germany declared war on Russia and France Aug 4, 1914 Britain declares war on Germany and this invades Belgium 1915 Allied offensive fruitless 1915 Italy joins the allies and attacks to Austria-Hungria 1915 Bulgaria joins the central empires and Allied landing in Thessaloniki 1915 Serbia is defeated without palliative care in the plain of Kosovo Polje 1916 German offensive on Verdun 1916 Russia occupies Bukovina and the eastern part of Galicia, but suffers heavy casualties in the prolonged offensive 1916 British and French started the offensive of the Somme 1916 Russia joins the allies 1916 Lloyd George, Prime Minister of the British government coalition 1917 The beginning of the Russian Revolution 1917 Germany helps Austria-Hungria in the war against Italy and expires in Caporetto and in Russia occur the October Revolution Jan 31, 1917 Germany starts the U-boat warfare against the merchant ships Apr 6, 1917 The United States declares war on Germany
