 This caused the ECMM's scope of work to be formally expanded to include Croatia on 1 September.On 8 October, Croatia declared independence from Yugoslavia, and a month later the ZNG was renamed the Croatian Army ("Hrvatska vojska" - HV).The fiercest fighting of the war occurred around this time, when the 1991 Yugoslav campaign in Croatia culminated in the Siege of Dubrovnik, and the Battle of Vukovar.