In middle 1980s, plans were made under formal top secret strategic and operational plan "Jedinstvo" (eng. unity). Because of internal and external security changes during that time "Jedinstvo" was later modeled in 3 parts "Jedinstvo 1" "Jedinstvo 2" and "Jedinstvo 3" starting from 1987. ( planned in end to be finished in 1995.) for the YPA to start major reform. Plans were mostly modeled to be realized under many covert strategic and operational moves so enemies could not know all and exact changes. During course of time between 1986 and 1990 major YPA exercise "Romanija" was conducted every year in order to fully reform YPA and get strategic perspective for high military leadership how and what should be done and how it is done. Most of scenarios in exercise included defense from NATO invasion including Albania and Austria with last exercise from series "Romanija 90" was done during 1990. with task of performing offensive at end of war scenario while units were reformed.