This special issue provides important new scholarship from a variety of perspectives on the structure, ideology and political history of the central fascist group in interwar and Second World War Yugoslavia, the Croatian Ustasha. It is the first volume in English to closely explore the Ustasha’s Independent State of Croatia between 1941 and 1945, a period when it was an active collaborator with Nazi Germany and Fascist Italy, and largely responsible for Yugoslavia suffering the highest proportion of national casualties in the Second World War. By using the top scholars in the field to explore the nature of the NDH, The Independent State of Croatia 1941-45 contributes to scholarly understandings of Croatian nationalism, Balkan politics, European fascism, and genocide in the Second World War.