and equipment. Given the first option for further air service, he selected the 1st Aviation Regiment, based at Warsaw's Okecie Airport. His graduation and promotion to second lieutenant were prevented by the outbreak of World War II. World War II During the Invasion of Poland by Nazi German troops (September 1939), Ścibor-Rylski served in the 1st Aviation Regiment: on September 6, he left Warsaw in the squadron of Major Władysław Prohazko. Initially on trucks, and then on foot, the group broke through German lines and retreated to the east. They took part in other clashes, rallying with the Independent Operational Group Polesie, under the command of Brigadier General Franciszek Kleeberg. After the capitulation of Kock, he attempted to break through to Romania, but he was captured in the village called Krzywda. After an escape from the prisoner-of-war camp, Ścibor-Rylski returned to Warsaw and joined the underground resistance movement, where he was introduced by his former commander Prohazko. He was sworn into the movement in September 1940, receiving the nom de guerre Stanislaw. From 1940 to June 1943, he worked in pharmaceutical company, Przemyslowo-Handlowe Zaklady Chemiczne Ludwik Spiess i Syn Spólka Akcyjna (the present-day Polfa factories). In parallel, from 1941, he was a partisan fighter behind the Eastern Front, in Kovel. Beginning January 1944, Ścibor-Rylski was engaged in fighting alongside Armia Krajowa's 27 Volhynian Infantry Division, throughout its advance route. From July of that year, he was in Warsaw, taking part in the Warsaw Uprising in the ranks of Czata 49 Battalion, based at the "Radosław" training camp. He was a company commander in the Sokół 50 Infantry Battalion. At the end of the war Major Ścibor-Rylski, by then also known under the code name Motyl ("Butterfly"), was in Łowicz. Following the German capitulation of April, he reported to Lieutenant Colonel Jan Mazurkiewicz that he had decided to terminate his activity with the resistance movement and return to civilian life in Poznań. Post-war period After the war and during the early years of the Polish communist regime, Ścibor-Rylski was head of the Bureau of Automobile Repairs Motozbyt in Poznań and then, from 1956, was employed by a worker cooperative (Zjednoczonych Zespołach Gospodarczych INCO). In August 1984, he joined the Civic Committee of the Commemoration of the 40th anniversary of the Warsaw Uprising. As member of the Association of the 27 Volhynian Infantry Division and the Kleeberg Association of Independent Operational Group