American Peace Mobilization (APM), a group whose aim was to keep the U.S. from participating in World War II. Before the signing of the Molotov–Ribbentrop Pact in Moscow 23 August 1939, the APM's precursor organization, the Comintern-directed American League for Peace and Democracy, had been anti-Nazi. Marcantonio served as the APM's vice-chair. He appeared in a newsreel in 1940 denouncing "the imperialist war", a line taken by Joseph Stalin and his supporters in the Soviet Union (USSR) until Operation Barbarossa. The Pact lasted until the Germans broke it by invading the Soviet Union on 22 June 1941. In 1942, Marcantonio worked to expand the U.S. military commitment to a second front in Europe against the Nazi German expansion, which became Operation Torch. The USSR ordered Communist parties throughout the world to promote the idea to help it defeat Nazism. Marcantonio was also a vice president of the International Workers Order, a fraternal benefit society unofficially affiliated with the Communist Party. In 1947, when the U.S. Congress passed legislation to provide financial aid to fight communism in Turkey and Greece, such as during the Greek Civil War, Marcantonio was the only congressman to not applaud the action, symbolizing his disagreement with the Truman Doctrine. In 1950, Marcantonio opposed American involvement in the Korean War. He argued that North Korea had been the victim of an unprovoked attack by South Korea. He cited articles by I. F. Stone, a radical journalist. Freedom of expression In 1941, Marcantonio represented Dale Zysman, a high school coach and board member of the New York City Teachers Union also known as Jack Hardy, a communist writer for International Publishers, in a New York Board of Education hearing. Marcantonio asked for a ten-day stay because the Board had failed to present "an itemized bill of particulars", which stay the Board denied. Zysman walked out. Spanish in Puerto Rico's schools In 1946, Marcantonio introduced legislation to restore Spanish as the language of instruction in Puerto Rico's schools asking President Harry S. Truman to sign the bill "in the name of the children of Puerto Rico who are being tortured by the prevailing system…to fight cultural chauvinism and to correct past errors." President Truman signed the bill. In 1948, schools were able to return to teaching in the Spanish language, but English was required in schools as a second language. Later life and death After his defeat in mayoral