According to the Glaise von Horstenau reports , Hitler was angry with PaveliÄ whose policy inflamed the rebellion in Croatia - by which Hitler lost ability to engage the Independent State of Croatia forces on the Eastern Front . According to reports by General Glaise-Horstenau , Hitler was angry with PaveliÄ , whose policy inflamed the rebellion in Croatia , thwarting any prospect of deploying NDH forces on the Eastern Front .