During the 1930s, with the rise of Adolf Hitler, Fr. Kentenich and other Schoenstatters, such as Fr. Franz Reinisch, criticized Nazism, and as a consequence the Schoenstatt Movement was registered as a threat to the Nazi-Regime. In 1941, Fr. Kentenich was arrested and sent to the Dachau concentration camp, where he began to expand Schoenstatt among the prisoners. He would remain there until 1945 when the concentration camp was liberated.Between 1947 and 1948, Fr. Kentenich visited South Africa, Brazil, Argentina, Uruguay, Chile and the United States to help communities in these countries to build up Schoenstatt. During this time, Fr. Kentenich met thousands of people, many of whom would play important roles in the development of the Movement, such as the Chilean Mario Hiriart and the Brazilian deacon Don Joao de Pozzobon. In 1950, Pozzobon began the Pilgrim Mother Apostolate. He travelled thousands of miles on foot to evangelize in schools, prisons, hospitals, and homes.