 Complete the following phrase:   During World War II, the Kingdom of Yugoslavia was invaded and partitioned by the Axis powers, and Kragujevac were occupied by Nazi Germany soldiers and underwent a number of tragic days during war. The local population were suppressed and many Serbian civilians, as well Roma and Jews, were murdered or have perished in concentration camps. The follow, many citizens of Kragujevac joined the resistance in the country and fought against the fascist occupation. The Nazis had issued an order to kill 50 Serbian civilians for every wounded German soldier and 100 for each German soldier killed. Especially tragic was the days between 1921 October 1941, when German Nazis assembled thousand of males from the town between the ages of sixteen and sixty, and were executed, today known as the 