Warsaw, and in March of that year, he carried out the assassination of Russian Police Officer Karl Nolken. Later on, he participated in a number of raids of the Combat Organization, including bank robberies, terrorist attacks on soldiers and police officers and acts of sabotage. After the split in the party, he joined Polish Socialist Party – Revolutionary Faction, and in 1906 left Congress Poland for Kraków, located at that time in Austrian Galicia. On June 18, 1906, Prystor married Janina Bakun, a fellow member of the Combat Organization. On September 26, 1908, Prystor was one of the participants of the legendary Bezdany raid. At the same time, he was actively involved in the activities of the Union of Active Struggle. On March 28, 1912, in Warsaw, Prystor was arrested by the Okhrana. After two years of imprisonment in Warsaw Citadel, he was in 1914 sentenced to 7 years of exile, and sent to prison in Oryol. Released after the February Revolution (March 17, 1917), he continued working for the Polish Socialist Party. After the capture of Minsk by the Imperial German Army (May 1918), Prystor came to Warsaw, to join Polish Military Organisation. Together with other activists, he prepared the assassination of General Hans Hartwig von Beseler, but the attack was cancelled. On November 10, 1918, Prystor was among the officials who welcomed Józef Piłsudski at Warszawa Główna railway station. Prystor was the godfather of Pilsudski's first daughter, Wanda, born on 7 February 1918. Second Polish Republic From 1918–1919, Prystor worked in the Ministry of Labour and Social Policy. In April 1919, he was the aide of General Lucjan Zeligowski and participated in the Vilna offensive. In June 1920, he volunteered for the army, to fight in the Polish–Soviet War. In July he was named company leader in the 201st Infantry Regiment of the Volunteer Division, commanded by Adam Koc (see Volunteer Army (Poland)). Prystor distinguished himself during the fighting, and was awarded the Cross of Valour. Before the Battle of Warsaw (1920), he was recalled from the frontline by Józef Piłsudski and became the personal assistant of the Polish Marshal. Prystor remained in the Polish Army until 1925. Promoted to major, he was transferred to head the local office of Wojskowa Komenda Uzupelnien (Army Recruiting Office) in Wilno, and together with his family, settled in the real estate at the village of Borki near Wilno (May 1925). Even