 Amid the fighting, both the German and Soviet armies disregarded the law of war set forth in the Geneva Conventions; the Soviets heavily publicised Nazi massacres of communists, Jews, and Romani.Stalin exploited Nazi anti-Semitism, and in April 1942 he sponsored the Jewish Anti-Fascist Committee (JAC) to garner Jewish and foreign support for the Soviet war effort.The Soviets allied with the United Kingdom and United States; although the US joined the war against Germany in 1941, little direct American assistance reached the Soviets until late 1942.