He wrote the book in New York City whilst still recuperating from his wounds during a propaganda publicity tour in the United States in 1941 organized by the British Government to attempt to raise support for the Allied cause and the U.S.A.'s entry into the war.
During his recovery from wounds in 1941, he wrote the book in New York City while on a propaganda tour organized by the British government to boost American support for the war effort and the United States' participation.