 Complete the following phrase:  In April 1941, Yugoslavia was occupied by Germany and Italy who created a puppet-state called the Independent State of Croatia NDH which was governed by the pro-Axis Ustasha organization. The Ustashas sought to create ethnically pure Greater Croatia by cleansing Serbs as well as Jews and Roma from its territory. The Ustashas regime systematically murdered around 300,000350,000 Serbs, as a part of a 