There is now no doubt that Bismarck helped to urge him to war. Alexander was pro-German, and had in 1870 secured the neutrality of Austria while Prussia attacked France. It is true that, when the Germans meditated a fresh attack upon the French in 1875, the Tsar interfered on behalf of France and greatly angered Bismarck. That statesman, however, retained influence at St. Petersburg, and, on the Frederician tradition of encouraging rivals to wear out each other, he urged Russia to attack Turkey. In 1877 (April) Russia entered the war, and its progress was so rapid that in the following March it compelled Turkey to sign the humiliating Treaty of San Stefano. Russia took from it very little territory directly, but, besides securing the recognition of the complete independence of Serbia and Rumania, it created a large principality of Bulgaria in which it hoped to have a predominant interest. England was, unfortunately, still in its mood of favouring the Turk, through jealousy of Russia, and Austria was less openly hostile. A desultory war continued, and Bismarck astutely offered the services of Germany as mediator, with the intention of curtailing its gains. By the Treaty of Berlin (July 13th, 1878) the San Stefano Treaty was torn up, and Bulgaria was cut down by half. Once more a costly war had, in the eyes of the people, done little for Russia; and there was the customary, and not unjust, cry that the course of the war had revealed a great deal of official corruption. The tragedy of the reign of Alexander ran on to its ghastly finale. In 1878 it was decreed that in future political prisoners should be tried by courts martial, and in the following year the Tsar appointed Governors General of St. Petersburg, Kharkoff, and Odessa, and gave additional and formidable powers to the Governors of Moscow, Warsaw, and Kieff. The system of repression was to be drastically pursued. The revolutionaries retorted by attempting to blow up the train in which Alexander returned from a visit to the Crimea. Three mines were laid. Near Moscow Sophia Perovskaia and a few associates had worked for two months digging a tunnel to the line from a house they had taken. The preparations were in this case perfect, but the Tsar escaped. The police had arranged three trains, and, as the Tsar changed train on approaching Moscow, leaving the middle for the first train, he was allowed to pass unharmed, and it was the second train that was blown to pieces. Sophia Perovskaia and her associates escaped and returned to their plotting. The heads of the revolutionary movement had decreed the death of Alexander II.