Pictures Strange and ridiculous of World War On 25 July Russia began mobilisation and on 28 July the Austro-Hungarians declared war on Serbia. Germany presented an ultimatum to Russia to demobilise, and when this was refused, declared war on Russia on 1 August. Previous Next 1 2 3 4 5 6 7 8 9 10 11 12 2017-07-04 admin Share ! tweet