the royal yugoslav army air force ( unk ) had only 77 modern fighter aircraft available to defend Defending belgrade against the hundreds of german fighters and bombers that struck Attack in the first wave early on 6 april .

UNK escaped Escaping yugoslavia after the war and moved Motion to francoist spain , where he was killed Killing by a person generally assumed Choosing to be an agent of the yugoslav state security service Supply .

despite the setbacks , the partisans remained Presence a credible fighting force , with their organization gaining Getting recognition from the western allies at the tehran conference Communication and laying the foundations for the post-war yugoslav state .

the war Hostile_encounter ended Process_end with the kumanovo treaty , with yugoslav and serb forces agreeing Agree_or_refuse_to_act to withdraw Escaping from kosovo to make way for an international presence .

the invasion Attack commenced Process_start with an overwhelming air attack Attack on belgrade and facilities of the royal yugoslav air force ( unk ) by the luftwaffe ( german air force ) and attacks Attack by german land forces from southwestern bulgaria .

at first the yugoslav partisans had mounted Self_motion diversions and conducted Action sabotage and had attacked Attack representatives of UNK 's quisling administration .

case white ( ) , also known as the fourth enemy offensive ( ) was a combined axis strategic offensive launched Process_start against the yugoslav partisans throughout occupied Control yugoslavia during world war ii .

operation Military_operation unk ( ) was a military offensive undertaken Action by the croatian army ( `` hrvatska vojska '' UNK hv ) against the yugoslav people 's army ( `` unk narodna armija '' UNK jna ) and sao western slavonia territorial defense Defending forces in the sava river valley , in the region of western slavonia during the croatian war of independence .

the bombing Attack of banski dvori ( ) was a yugoslav air force strike Attack on the banski dvori in unk official residence of the president of croatia at the time of the croatian war Hostile_encounter of independence Change_of_leadership .

the airstrike Attack occurred Presence on 7 october 1991 , as a part of a yugoslav air force attack Attack on a number of targets in the croatian capital city .

it was planned Arranging and conducted Action by a group of pro-western unk royal yugoslav army air force officers formally led by its commander , general UNK UNK , who had been associated Collaboration with several putsch plots from 1938 onwards .