 Waszyński began a new career as a theater director, first in Białystok and later in Moscow.In the summer of 1941, after Germany invaded the Soviet Union, Waszyński joined the newly formed Polish Army of general Władysław Anders (loyal to the Polish government in Exile in London) and subsequently was relocated to Persia (Iran), and later as a soldier of the 2nd Corps of the Polish Army to Egypt and Italy.As a member of the army film unit, he filmed the Battle of Monte Cassino, where the Polish Army suffered great losses, but helped to win the day.