In 1989. plan "Jedinstvo 2" has started and border battalions were transferred under corps command including some divisions that have remained before under others commands. Brigades got some artillery and antiaircraft batteries under their direct command that helped them to gain more independence in war time from higher levels. Defense of all major cities was until then planned with separate units but under "Jedinstvo 2" only Belgrade and Zagreb retained separated units for defense of cities - command for defense of city of Belgrade and command for defense of city of Zagreb.