He participated in the September campaign as a volunteer in the Chełm Regiment Zborny, he took part in the Battle of Tomaszów Lubelski. Together with his regiment, he was surrounded by the Red Army near Kamionka Strumiłłowa on the bug. He managed to return to Grabków on October 17, after taking off his uniform. During the occupation, he was a member of the Home Army for the Polish Underground State. He also hid Jews and survived the war with his family in Grabków.