After the Great Retreat of the Russian army, the Chief of the General Staff Nikolai Yanushkevich, with the full support of the Grand Duke Nicholas, ordered the army to devastate the border territories and expel the "enemy" nations within. The Russian authorities launched pogroms against German populations in Russian cities, massacred Jews in their towns and villages and deported 500,000 Jews and 250,000 Germans into the Russian interior. On 11 June 1915, a pogrom began against Germans in Petrograd, with over 500 factories, stores and offices looted and mob violence unleashed against Germans. The Russian military leadership regarded Muslims, Germans and Poles as traitors and spies, while Jews were considered political unreliables.