Senyavin played an instrumental role in this conflict securing victories at both the Battle of the Dardanelles (1807) and the Battle of Athos. After the conclusion of the Napoleonic Wars, the Russians, together with the British and French, intervened in the Greek War of Independence defeating the Turkish fleet at the Battle of Navarino in 1827 and helping to secure Greek independence (though once again, the Russian fleet was compelled to deploy from the Baltic). Turkish closure of the Dardanelles Straits then sparked a renewed Russo-Turkish conflict from 1828 to 1829 which led to the Russians gaining further territory along the eastern Black Sea. The restriction imposed on the Black Sea Fleet by Turkish control of the Straits was influential in motivating Russia from time-to-time to attempt to secure control of the passage, which became a recurrent theme in Russian policy. From 1841 onward the Russian fleet was formally confined to the Black Sea by the London Straits Convention. However, within the Black Sea itself, the Turks found themselves at a naval disadvantage in relation to the Russian Black Sea Fleet. In 1853, the Black Sea Fleet destroyed Turkish naval forces at the Battle of Sinop after the Turks had declared war on Russia. Nevertheless, during the ensuing Crimean War, the Russians were placed on the defensive and the allies were able to land their forces in Crimea and, ultimately, capture Sevastopol. As a result of the Crimean War, one provision of the 1856 Treaty of Paris was that the Black Sea was to be a demilitarized zone similar to the Island of Åland in the Baltic Sea. This hampered the Russians during the Russo-Turkish War of 1877-78 and in the aftermath of that conflict, Russia moved to reconstitute its naval strength and fortifications in the Black Sea. The Black Sea Fleet would play an instrumental political role in the 1905 Russian Revolution with the crew of the battleship revolting in 1905 soon after the Navy's defeat in the Russo-Japanese War. The revolt acquired a symbolic character in the lead up to the Russian Revolutions of 1917 and after, as portrayed in the 1925 film by Sergei Eisenstein, Battleship Potemkin. Lenin wrote that the Potemkin uprising had had a huge importance in terms of being the first attempt at creating the nucleus of a revolutionary army. World War I and Russian Civil War During World War I, there were a