The siege of Dubrovnik was a military engagement fought between the Yugoslav People's Army (JNA) and Croatian forces defending the city of Dubrovnik and its surroundings during the Croatian War of Independence. The JNA started its advance on 1 October 1991, and by late October, it had captured virtually all the land between the Pelješac and Prevlaka peninsulas on the coast of the Adriatic Sea, with the exception of Dubrovnik itself. The siege was accompanied by a Yugoslav Navy blockade. The JNA's bombardment of Dubrovnik, including that of the Old Town—a UNESCO World Heritage Site—culminated on 6 December 1991. The bombardment provoked international condemnation, and became a public relations disaster for Serbia and Montenegro, contributing to their diplomatic and economic isolation, as well as the international recognition of Croatia's independence. In May 1992, the JNA retreated to Bosnia and Herzegovina, less than 1 kilometre from the coast in some places, and handed over its equipment to the newly formed Army of Republika Srpska (VRS).