Józef Piłsudski (1867–1935) was Chief of State (1918–22), "First Marshal", and authoritarian leader of the Second Polish Republic. From mid-World War I he was a major influence in Poland's politics, and an important figure on the European political scene. He is considered largely responsible for Poland regaining independence in 1918, after 123 years of partitions. Early in his political career, Piłsudski became a leader of the Polish Socialist Party. Concluding, however, that Poland's independence would have to be won by force of arms, he created the Polish Legions. In 1914 he anticipated the outbreak of a European war, the Russian Empire's defeat by the Central Powers, and the Central Powers' defeat by the western powers. When World War I broke out, he and his Legions fought alongside the Austro-Hungarian and German Empires to ensure Russia's defeat. In 1917, with Russia faring badly in the war, he withdrew his support from the Central Powers. From November 1918, when Poland regained independence, until 1922, Piłsudski was Poland's Chief of State. In 1919–21 he commanded Poland's forces in the Polish–Soviet War. In 1923, with the Polish government dominated by his opponents, particularly the National Democrats, he withdrew from active politics. Three years later he returned to power with the May 1926 coup d'état, and became the de facto dictator of Poland. From then until his death in 1935, he concerned himself primarily with military and foreign policy.