'Ivan' was a German and Croat operation against the partisan forces of Josip Broz Tito in the Moslavačka mountain region in the puppet state of Croatia in Axis-occupied Yugoslavia (4/6 July 1943).

The undertaking took the form of a sweep against undetermined partisan forces by some 20,000 to 25,000 men under the control of Generalleutnant Josef Brauner von Haydringen’s 187^th Reserve-Division, and the German contribution was elements of the 462^nd Reserve-Grenadierregiment, 1/130^th Reserve-Grenadierregiment, 2/130^th Reserve-Grenadierregiment, 1/135^th Reserve-Grenadierregiment, 2/482^nd Reserve-Jägerregiment, 86^th Reserve-Pionierbataillon and one Panzerzug (armoured train), while that of the Croats was Pukovnik Josip Solc’s headquarters and 1/1^st Mountain Brigade, 3/1^st Mountain Brigade and 4/1^st Mountain Brigade, 2/2^nd Regiment, 1^st Bicycle Battalion, Provisional Battalion 'Bojnik Josić' (one company of the 1^st Assault Battalion reinforced with recruits and artillery), Agricultural Security Battalion, elements of the 5^th Railway Security Battalion, 11^th Usta’e Battalion and two armoured trains.

As a result of 'Varazdin', which was deemed a more important operation and thought to require additional Axis manpower, the sweep was terminated after just three days, by which time only the most limited contract had been made with the partisans.