Operation Hurricane-91 () was a military offensive undertaken by the Croatian Army ("Hrvatska vojska" – HV) against the Yugoslav People's Army ("Jugoslovenska Narodna Armija" – JNA) and SAO Western Slavonia Territorial Defense Forces in the Sava River valley, in the region of Western Slavonia during the Croatian War of Independence. The operation began on 29 October 1991 and ended on 3 January 1992 when a nationwide ceasefire was signed to implement the Vance plan. The offensive was aimed at recapturing the region, in conjunction with two other HV offensives launched against SAO Western Slavonia in the north of the region within days.