When the great powers of Europe went to war in August 1914, Leon Trotsky was living in Vienna. Fearing arrest, he fled to Switzerland for three months. In November 1914 he moved to France as a war correspondent for Kievskaya Mysl, a liberal newspaper for which he had worked since 1909, including during the Balkan wars (1912-13). Trotsky was a participant in the anti-war socialist conferences of Zimmerwald (September 1915) and Kienthal (April 1916), which laid the basis for a new international. He was deported from France in October 1916, travelling through Spain, where he was briefly imprisoned, arriving in New York in January 1917. He left for Russia at the end of March 1917, and there, with Lenin, helped lead the revolution that created the world’s first workers’ state.