sentences:  The types of aircraft were mostly MiGs.MiG-15, MiG-19, and MiG-21F fighters was produced in license; in the 1970s, MiG-23MF were bought, accompanied by MiG-23ML and MiG-29s in the 1980s.During the 1980s and early 1990s, the Czechoslovak Air Force consisted of the 7th Air Army, which had air defense duties, and the 10th Air Army, responsible for ground forces support.