Niš (Ниш) is the third-largest city in Serbia and the administrative center of the Nišava District.
Sarajevo (see names in other languages) is the capital and largest city of Bosnia and Herzegovina, with a population of 275,524 in its current administrative limits.
Serbo-Croatian, also called Serbo-Croat, Serbo-Croat-Bosnian (SCB), Bosnian-Croatian-Serbian (BCS), or Bosnian-Croatian-Montenegrin-Serbian (BCMS), is a South Slavic language and the primary language of Serbia, Croatia, Bosnia and Herzegovina, and Montenegro.
Skopje (Скопје) is the capital and largest city of the Republic of Macedonia.
The Air Force and Air Defence (Ratno vazduhoplovstvo i protivvazdušna odbrana / Ратно ваздухопловство и противваздушна одбрана; abbr. RV i PVO / РВ и ПВО), was one of three branches of the Yugoslav People's Army, the Yugoslav military.
The 13th Air Defense Division (Serbo-Croatian: 13. divizija protivvazdušne odbrane/ 13. дивизија противваздушне одбране) was an air defense division established in 1968.
The 3rd Corps of Air Force and Air Defense (Serbo-Croatian: 3. korpus ratnog vazduhoplovstva i protivvazdušne odbrane/ 3. корпус ратног ваздухопловства и противваздушне одбране) was an joint unit of Yugoslav Air Force established in 1964 as 1st Aviation Corps (Serbo-Croatian: 1. vazduhoplovni korpus / 1. ваздухопловни корпус).