taken to surmount its military weakness." To compensate for its defeat in the Crimean War, the Russian Empire then embarked in more intensive expansion in Asia, partially to restore national pride and partially to distract Britain on the world stage, intensifying the Great Game. The war also marked the demise of the first phase of the Concert of Europe, the balance-of-power system that had dominated Europe since the Congress of Vienna in 1815 and had included France, Russia, Prussia, Austria and the United Kingdom. From 1854 to 1871, the Concert of Europe concept was weakened, leading to the crises that were the unifications of Germany and of Italy, before a resurgence of great power conferences. In 1870, Prussia persuaded Russia to remain neutral in the Franco-Prussian war. Bismarck, having declared it impossible to keep 100 million Russians in a humiliated position without sovereign rights to their Black Sea coastline, supported Russia against the Treaty of Paris, and in return, Prussia achieved freedom of action against France in 1870–71 and inflicted a crushing defeat on it. Historical analysis According to historian Shepard Clough, the war The view of "diplomatic drift" as the cause of the war was first popularised by A. W. Kinglake, who portrayed the British as victims of newspaper sensationalism and duplicitous French and Ottoman diplomacy. More recently, historians Andrew Lambert and Winfried Baumgart have argued that Britain was following a geopolitical strategy in aiming to destroy the fledgling Russian Navy, which might challenge the Royal Navy for control of the seas, and that the war was also a joint European response to a century of Russian expansion not just southwards but also into Western Europe. Documentation Documentation of the war was provided by William Howard Russell, who wrote for The Times newspaper, and by Roger Fenton's photographs. News from war correspondents reached all of the nations involved in the war and kept the public citizenry of those nations better informed of the day-to-day events of the war than had been the case in any earlier war. The British public was very well informed on the day-to-day realities of the war. After the French extended the telegraph to the coast of the Black Sea in late 1854, news reached London in two days. When the British laid an underwater cable to Crimea in April 1855, news reached London in a few hours. The daily news reports energised public opinion,