Józef Piłsudski
He came to Warsaw in November 1918 and helped to organize Poland, which now existed again after 123 of partition. Then, for a short time, he became its leader (not president but head of state). Gabriel Narutowicz became Poland's first president, but he was assassinated a few days later and Stanisław Wojciechowski became the next president. Piłsudski was shocked and left politics for a few years.