The massacre at Kraljevo , as well as a similar and nearly concurrent massacre in nearby Kragujevac , convinced German commanders that mass killings of Serbian hostages were not only ineffectual but also counterproductive , as they drove locals into the hands of insurgents and sometimes resulted in the deaths of factory workers contributing to the German war effort . Following the war , several senior German military officials were tried and convicted for their involvement in the reprisal shootings at the Nuremberg Trials and the Subsequent Nuremberg trials
massacre
Kragujevac massacre
Kraljevo massacre