Józef Klemens Piłsudski[a] (5 December 1867 – 12 May 1935) was a Polish statesman who served as the Chief of State (1918–1922) and First Marshal of Poland (from 1920). He was considered the de facto leader (1926–35) of the Second Polish Republic as the Minister of Military Affairs. After World War I, he held increasing dominance in Polish politics and was an active player in international diplomacy. He is viewed as a father of the Second Polish Republic re-established in 1918, 123 years after the final Partition of Poland in 1795.