This was a German and Croat operation against the Yugoslav forces of Marshal Josip Broz Tito in south-western Croatia round the village of Kocerina within Axis-occupied Yugoslavia (21 December 1944).

Schemed as a successor to ‘Heuschober’, the undertaking involved two reinforced battalions of the 370^th Grenadierregiment (kroatisch) of Generalleutnant Georg Reinicke’s 369^th Division (kroatisch) together with Ustaše Dopukovnik Vladimir vitez Majer’s 9^th Ustaše Brigade and an Ustaše militia company, and managed to push parts of 13^th ‘Dalmatia’ Brigade of the 9^th Division and 10^th ‘Herzegovina’ Brigade of the 29^th Division back to Kocerina. At the same time the 2/370^th Grenadierregiment advanced into Buhovo.