The foreign missionary activities resumed again some years after the war. Johannsen and Hosbach came back in 1926. In the same year, Dr. Muller started medical service at Bumbuli Hospital. More pastors were ordained and several mission stations were built as the work expanded. Institutions like Magamba Secondary School, Magamba Trade School, Irente School for the Blind, Irente Orphanage and Lutindi Mental Hospital were started.