Ustashe 's unseen cruelty and savagery applied against Serbs and Jews even prompted the German command to demand that FrancetiÄ , as the commander of the 1st Brigade Black Legion , be dismissed . PaveliÄ defied and promoted FrancetiÄ to commander of all Ustashe field formations . Ustashe 's unseen cruelty and savagery applied against Serbs and Jews even prompted the German command to demand that FrancetiÄ , as the commander of the 1st Brigade Black Legion , be dismissed which PaveliÄ refused , promoting FrancetiÄ to commander of all Ustashe field formations .