'Gustav' (ii) was a German and Croat operation against the partisan forces of Josip Broz Tito in the puppet state of Croatia in Axis-occupied Yugoslavia (15/17 March 1943).

The undertaking’s objective was the destruction of undetermined partisan units, with a strength estimated at between 1,000 and 1,500 men) and retake the town of Grbavci some 9.25 miles (15 km) to the south-west of Bosanska Gradiska. The German contribution was elements of Generalleutnant Karl Eglseer’s 714^th Division and the Volksdeutschbataillon 'Ludwig von Baden', and that of the Croats the 4/4^th Mountain Brigade, elements of the 10^th Regiment, and the 4^th Ustase Battalion.

Despite the fact that they had only just taken the town, the partisans withdrew from Grbavci before the Axis forces arrived, and no fighting ensued.