History Timeline By tia_2310 Jun 28, 1914 Archduke and Archduchess visit Sarajevo Jun 28, 1914 Gavrilo Princip is arrested Jun 28, 1914 Gavrilo Princip fired two shots Gavrilo Pricip fired two shots at Archduke Franz Ferdinand and his wife Sophie. Jul 23, 1914 Austria-Hungary sends ultimatum to Serbia Jul 25, 1914 Serbia agrees to two of the three terms of the ultimatum Jul 28, 1914 Austria-Hungary declares war on Serbia Jul 30, 1914 Russia mobilizes to defend Serbia Jul 31, 1914 Germany orders France and Russia to stop mobilizing Aug 1, 1914 Germany declares war on Russia Aug 1, 1914 France mobilizes to support its Russian ally Aug 2, 1914 Germany declares war on France Aug 3, 1914 Germany begins the Schlieffen Plan and attacks France through neutral Belgium Aug 4, 1914 Germany invades Belgium Aug 4, 1914 Britain declares war on Germany Aug 4, 1914 Canada is automatically at war against Triple Alliance
