'Wegweiser' was a German operation to clear the partisan forces of Marshal Josip Broz Tito from that part of Syrmia, in German-occupied Yugoslavia, which threatened the railway line linking Zagreb and Belgrade, in particular the forests around Bosut and the villages flanking the Sava river (10/13 March 1944).

The undertaking was controlled by SS-Brigadeführer und Generalmajor der Waffen-SS Karl-Gustav Sauberzweig’s 13^th SS Gebirgsdivision 'Handschar' (kroatische Nr 1), and was also the first time that this formation had seen action. The land forces were divided into three Kampfgruppen: Kampfgruppe 1 comprised the 13^th Artillerieregiment of the 13^th SS Gebirgsdivision, one reconnaissance detachment, two companies of the 40^th Jägerregiment of Generalleutnant Josef Brauner von Haydringen’s 42^nd Jägerdivision, one platoon of self-propelled guns, one platoon of 88-mm (3.465-in) Flak guns and one police company; Kampfgruppe 2 comprised the 28^th SS Gebirgsjägerregiment of the 13^th SS Gebirgsdivision, one battalion of artillery and one company of police; and Kampfgruppe 3 comprised the 27^th SS Gebirgsjägerregiment of the 13^th SS Gebirgsdivision, one battalion of artillery, one company of pioneers, two platoons of Flak guns and support elements of the 42^nd Jägerdivision, which also provided blocking units.

The Croat armed forces also provided the river gunboat Bosna.