In April 1941, Ante Pavelic ́, the fascist leader of the Independent State of Croatia, and his paramilitary force, the Ustasˇe (‘‘rebels’’), began a genocide that killed at least 330,000 Serbs and essentially eliminated Jews and Roma from Croatia. The American response to genocide in Croatia provides a fuller context for examining Washington’s reaction to the Nazi genocide. By the summer of 1941, the US government had reliable information that genocide was taking place in Croatia. Washington expressed little interest in this slaughter, except insofar it affected Croatian–American and Serbian–American relations; made no direct public statement condemning the Ustasˇe’s actions; and offered no protest to the Vatican. Croatian events, however, propelled the FBI and the Office of War Information to suppress pro-Ustasˇe supporters in the United States.
"The United States’ Response to Genocide in the Independent State of Croatia, 1941–1945,"
Genocide Studies and Prevention: An International Journal:
Available at: https://scholarcommons.usf.edu/gsp/vol3/iss1/6