During the September campaign, he was the commander of the 8th company of the 95th infantry regiment. He participated in the battles in the region of Puławy and Kazimierz Dolny and in the second battle of Tomaszów. After the capitulation, he stayed in Chełm and Sierpc. In December 1939, he made an attempt to get to Hungary. He was arrested in Tarnów, but managed to escape the same day. He crossed the Polish-Slovak border on the night of December 17–18, 1939. Then he made his way to Hungary and Yugoslavia, from where he travelled by sea to France.