 Some communist-led organizations with links to the Comintern opposed the war during the period of the Hitler-Stalin pact but then backed it after Germany invaded the Soviet Union.However, the most popular communist organization in the US at the time, the Communist Party of the USA, firmly maintained an anti-fascist outlook on intervention throughout WWII, basing their policies on the need for a Popular Front against fascism.A few nationalist movements in colonial countries would take no part in the conflict, which they saw as one of the colonialists' making.