'Heu' was a German operation against the partisan forces of Josip Broz Tito in Axis-occupied Yugoslavia (10/15 August 1943).

The operation was carried out by the 1 and 3/383^rd Grenadierregiment reinforced by other units of Generalleutnant Emil Zellner’s 373^rd Division (kroatische), and was fought in the area to the west of the line extending between Kostajnica and Bosanski Novi. The German forces surrounded a large area, but only minor skirmishes took place.