Battle of Košare

On 9 April 1999, at 03:00, an artillery barrage began from the Albanian side of the border, aimed in the direction of the Košare military outpost, which was occupied by the Yugoslav Army, in what became one of the bloodiest battles of the Kosovo War.[14] The Albanians attacked in three directions, the first was towards Rrasa e Koshares, the second was towards the well-defended Košare outpost and the third was towards Maja Glava. Approximately 136 KLA soldiers[4] reached the border and attacked Yugoslav positions. At that time less than 200 members of the Yugoslav Army were stationed at the front line. Bloody fighting ensued and lasted the whole day with 4 dead and one wounded on the Albanian side and 23 dead on the Yugoslav side.[15] Later, the KLA seized the peak of Rrasa e Koshares and immediately began entrenching themselves. Serbian reports claim that the KLA insurgents were assisted by British, French, German and Italian special forces.[16]

The battle continued all night until the next morning. Then, with massive artillery support, the KLA took Maja Glava and continued to bombard the Košare Outpost, which resulted in the Yugoslav soldiers having to abandon their posts.[17] At 19:00, members of the KLA entered the abandoned outpost and CNN and the British BBC broadcast images of a great number of KLA militants taking the outpost.

Members of the Yugoslav Forces then retreated towards the second line of defense above the outpost. Those positions were much more easier to defend. The next day, Yugoslav reserve troops arrived to relieve the First Army. One batch of KLA soldiers managed to cut the Yugoslav line of communications, and managed to disable one BOV armoured personnel carrier. During the night, the KLA attacked the Yugoslav Army at Opijaz, trying to shatter the resistance of the Yugoslav soldiers, but all of the attacks were unsuccessful and resulted in the Yugoslav Army inflicting heavy losses on the KLA insurgents. The next day, the KLA tried to break the resistance of the second defensive line of the Yugoslav Army, with little success. Meanwhile, the Yugoslavs managed to bring in their Special Forces and also a few artillery pieces.

On 13 April, the Yugoslav and Albanian armies clashed at the border near Krumë.

Albanian Army and KLA artillery continued to shell the Yugoslav Army's positions from Maja Glava and Rrasa e Koshares. The Yugoslav Army Headquarters decided to launch a sudden attack and surprise the enemy. On April 14, Yugoslav troops attacked Maja Glava. The distance between the two enemy trenches wasn't longer than 50 meters. The Yugoslav Army was unable to take Maja Glava completely, but it prevented the Albanians' artillery from engaging them from their positions. The Maja Glava front was stabilized until the end of the war, without any changes on the lines.

In April, there weren't any changes on the front lines at Rrasa e Koshares and both sides suffered heavy losses. Many Yugoslav soldiers were killed by the non-stop artillery bombardment, while many KLA soldiers were killed in numerous unsuccessful attempts to break the Yugoslav lines of defense.

May began with several unsuccessful attacks by the Yugoslav Army to take back the Košare outpost. The attacks were made unsuccessful because of the constant artillery fire aimed at their positions. On the 6th of May, the Yugoslav Army counterattacked at Rrasa e Koshares, in an effort to halt the artillery bombardment. A bloody skirmish ensued, but the Yugoslav Army did not manage to take Rrasa e Koshares. On 10 May, the Yugoslav Army sent two T-55 tanks to help stabilize the offensive on Rrasa e Koshares. When the tanks penetrated the KLA's lines, they advanced over 100 meters into insurgent-held territory, but the KLA still managed to retain control of Rrasa e Koshares. During the night of 10/11 May, NATO bombers dropped dozens of bombs on the Yugoslav troops who had attacked KLA positions around Rrasa e Koshares. At least in two of these instances NATO dropped cluster bombs on Yugoslav army troops. In these attacks, NATO killed eight Yugoslav soldiers and one officer and managed to wound over 40. The KLA seized the opportunity to attack and fought the Yugoslav soldiers out of their positions and forced them back.

During the middle of May, many bloody skirmishes were fought at Mrcaj, which was eventually taken by the Yugoslav Army. After the Yugoslavs had inflicted some casualties on the insurgents, the KLA had to retreat from their positions giving the Yugoslavs the chance to take the now undefended position. This development allowed the Yugoslav Army to stabilize their position on the battlefield and to hold the attackers outside of their second line of defense.

On 22 May, NATO aircraft mistakenly bombed KLA positions, killing 7 or 67.[7][6]

Throughout May, NATO conducted air operations against Serbian targets in Kosovo and Serbia, some which included collateral damage–death of civilians.[18]