Afterwards, the division took part in the Fourth anti-Partisan Offensive in Croatia's Zagreb-Karlovac area, where together with Italian forces attempted to defeat the Yugoslav Partisans commanded by Josip Broz Tito, the operation failed and most of the Partisans managed to evade the main attack. In Operation Weiss I, the division advanced from Karlovac area against the Yugoslav National Liberation Army (NOVJ) resistance and on January 29 captured informal partisan capital Bihać. In Operation Weiss II, it forced its way from western Bosnia to Mostar area in Hercegovina and also deployed units northwest of Sarajevo.