 Complete the following phrase:  Germany and its allies invaded the Kingdom of Yugoslavia on 6 April 1941, shortly after the CvetkovićMaček Agreement that created an autonomous Banovina of Croatia was signed in August 1939. The agreement had caused resentment and opposition among the Serbs. On 10 April 1941, the Independent State of Croatia NDH was proclaimed and was initially met with enthusiasm. Vladko Maček, the leader of a powerful Croatian Peasant Party HSS and the de facto political leader of Croats at the time, refused Germans offers to head or take part in the government of the NDH and following the invasion opted for political passivity. Under the rule of the Ustashe party that took power, the NDHs constitution was based on a totalitarian ideology that developed under the influence of Nazism and Fascism. Racial laws were soon enacted and the Ustaše 