 Complete the following phrase:  During the Invasion of Poland, Szczepanik was interned in Lithuania and later captured by the Soviet forces. From 1940 until 1942, he was held prisoner in the Soviet Gulag camps in Kozielsk and Kola Peninsula. Following the outbreak of the Russo-German War and signing of the Sikorski-Mayski Agreement, he was released and joined the Polish II Corps under general Władysław Anders. As an Officer and eventually Major in the Polish Army, he served with distinction in the Fifth Polish Artillery Regiment  notably in the battles of Monte Cassino, 