In 1917, the Romanian Army recovered and succeeded in stopping German attempts to break the front, in spite of the disintegration of the Russian Army after the February Revolution. The exit of Russia from the war in March 1918 with the Treaty of Brest-Litovsk left Romania alone in Eastern Europe, and a peace treaty between Romania and the Central Powers (Treaty of Bucharest (1918)) was negotiated in May 1918. The toll of the campaign was approximately 220,000 dead for Romania, but in the end it gained Transylvania, two-thirds of the Banat, Bukovina, and Bessarabia.