 At the outbreak of World War II, Chisholm, a conscientious objector, was declared unfit for military service on the basis of poor eyesight and a crooked arm. During the war he conducted performances with the Carl Rosa Opera Company in 1940, and later joined the Entertainments National Service Association as a colonel touring Italy with the Anglo-Polish Ballet in 1943 and served as musical director to the South East Asia Command between 1943 and 1945. He first formed a multi-racial orchestra in India, however after arguments with his superior, Col. Jack Hawkins, he was removed to Singapore. Here in 1945 he founded the Singapore Symphony Orchestra. Many of the musicians were ex-prisoners of War, and from them Chisholm recruited Szymon Goldberg as leader. Goldberg had successfully hidden his Stradivarius violin up a chimney in the prison camp for three and a half years. Chisholm created a truly cosmopolitan orchestra of fifteen nationalities from East and West, which gave 50 concerts in Malaya within six months. After returning to Scotland, Chisholm married his second wife, Lillias, the daughter of Scottish composer Francis George Scott. In 1946 he was appointed professor of music at the University of Cape Town and director of the South African College of Music.
