'Zagorje' was a Croat operation against the partisan forces of Josip Broz Tito in the Kalnik mountain region in the Novi Marof area of the puppet state of Croatia in Axis-occupied Yugoslavia (24 June/1 July 1943).

The undertaking’s objective was to comb the Kalnik mountain region between Varazdin and Krizevci and clear it of the concentrations of the 'Kalnik' Partisan Detachment. The Croat forces committed to the operation were elements of the 1^st Bicycle Battalion, elements of the 11^th Ustase Battalion, 2^nd and 4^th Companies of the Ustase Garrison Battalion 'Zagreb', 1^st Expeditionary Company[/e[ of the 14^th Regiment, one company of the 1^st Domobran Assault Battalion, one company of the 1/2^nd Recruit Regiment, and one company of the 3/2^nd Recruit Regiment.