[15] After a series of unsuccessful ceasefires, the United Nations Protection Force (UNPROFOR) was deployed to Croatia to supervise and maintain the agreement.
In the final days of March, the Bosnian Serb army started shelling Bosanski Brod, and the HV 108th Brigade crossed the border adjacent to the town in reply.
[19] In April 1992, the JNA renewed its offensive operations against the HV and the HVO near Kupres and Stolac in western and southern Herzegovina.
The JNA's 2nd Military District, commanded by Colonel-General Milutin Kukanjac, deployed elements of the 5th Banja Luka Corps and the 9th Knin Corps to the Kupres area, capturing the town from the HV and the HVO jointly defending the area in the Battle of Kupres on 7 April 1992 and threatening Livno and Tomislavgrad to the south-west.
HV General Janko Bobetko, appointed to lead the Southern Front, reorganized the HVO command structure and assumed control of its forces in the area to stop the expected JNA/VRS offensive and regain the lost territory.
In late May, Bobetko launched an attack along the Adriatic coast and in its immediate hinterland, towards besieged Dubrovnik, linking up with the HV force in the city and ending its encirclement by the JNA on 1 June.
The attack coincided with the JNA's withdrawal from the area towards Dubrovnik Airport in Konavle and to positions within the borders of Bosnia and Herzegovina.
Although the VRS in the area had fewer troops, it had greater artillery firepower at its disposal and the advantage of defending in rugged terrain.
[32][33][34] Following the HV's failed attempt to push the VRS further away from Dubrovnik in early June, Bobetko planned another effort to secure the city, codenamed Operation Tiger.
[29] Another effort to capture Golubov Kamen at the head of the Rijeka Dubrovačka embayment of the Adriatic Sea was made on 1 July.
The initial attack, spearheaded by the 3rd Battalion of the 4th Guards Brigade, gained ground but the objective was not secured until 2 July, after VRS troops mounted a counter-attack.
[32] As the guards brigades reached their objectives, the newly gained ground was gradually turned over to reserve HV units.
The retreat created a gap in the HV defences, threatening the town of Slano, but the 3rd Battalion of the 4th Guards Brigade closed it.
On 13 July, a platoon drew from the 2nd Guards Brigade attempted to capture the Vlaštica Peak, but the attack failed, marking the end of Operation Tiger.
[32] Until 17 July, the VRS continued its attacks aimed at retaking territory lost in Operation Tiger, gradually pushing the HV back towards Dubrovnik.
Although substantial parts of the territory gained during the attack were surrendered to the VRS, the operation strengthened the HV defences in the area by 8 August.
The JNA's main concern was retaining control in the area, and specifically on the Prevlaka peninsula at the entrance of the Bay of Kotor.
[37] However, it was replaced by the VRS on the high ground overlooking the low-lying coastal plateau containing Dubrovnik Airport and the town of Cavtat.
Bobetko appointed Major General Nojko Marinović—commander of the HV during the siege of Dubrovnik—to perform a landing operation in the Cavtat area the same day.
The 1st Battalion and an independent armoured-mechanized company of the 4th Guards Brigade were deployed to draw off some of the VRS defences as they attacked towards the village of Cerovac and Hum railway station.
[39] By 26 October, the VRS left flank in Popovo field collapsed and the town of Trebinje, the main Bosnian Serb centre in the region, came into jeopardy.
[32] The subsequent negotiated withdrawal of the JNA from Konavle and the HV's rapid capture of the region before the VRS could move in, and other offensive operations in the Dubrovnik hinterland secured a Croatian strategic victory.
The entire region of southern Dalmatia was brought under Croatian control, the siege of Dubrovnik was lifted and the city's safety was largely improved by the end of October 1992.
[46] The Tuđman–Ćosić agreement on the pullout of JNA troops from Konavle provoked an emotional response in Yugoslavia, where it was interpreted as a defeat and betrayal.
[49] As of February 2013[update], the Prevlaka Peninsula remains demilitarized, with Croatian and Montenegrin police jointly patrolling the sea.