Weiss 1 aimed at destroying Partisan-held areas Lika, Kordun, Banija, Cazinska Krajina and Grmeč. It started on 20 January 1943 and lasted until 25 February. Weiss 2 focused on Partisans in the southeast of the Bihać Republic: Drvar, Glamoč, Livno, Jajce and Ključ.