Initially well-known for his performances and recordings of politically-themed songs, he continued to surface in the stage and film versions of Bertolt Brecht’s play The Threepenny Opera and afterwards starred within a theatrical production of another of Brecht’s works, Life of Galileo. In the first 1930s, the Nazi routine targeted Busch for his communist sights, but he could get away persecution by fleeing towards the Soviet Union. He eventually joined up with a volunteer Second Spanish Republic military known as the International Brigades and fought in the Spanish Civil Battle while also documenting numerous political music about the conflict. In the first 1970s, he received the Lenin Tranquility Prize. A indigenous of Kiel, Germany, he resided in the Soviet Union, Spain, and Belgium before time for East Berlin in the middle 1940s. He documented many songs with the Austrian composer Hanns Eisler.