Serialized in the Daily Worker in March 1940,[9] published by the Communist Party USA to which Trumbo belonged,[10] the book became "a rally point for the political left" which had opposed involvement in World War II during the period of the Molotov–Ribbentrop Pact (1939–1941) when the USSR maintained a non aggression pact with Nazi Germany. Shortly after the 1941 German invasion of the Soviet Union, Trumbo and his publishers decided to suspend reprinting the book until the end of the war, due to the Communist Party USA's support for the war so long as the US was allied with the Soviet Union against Nazi Germany.[10]
In his introduction to a 1959 reprinting, Trumbo describes receiving letters from right-wing isolationists requesting copies of the book when it was out of print. Trumbo contacted the FBI and turned these letters over to them. Trumbo regretted this decision, which he later called "foolish," after two FBI agents showed up at his home and it became clear that "their interest lay not in the letters but in me."[11]