This edition of FRUS contains an interesting foot =note describing an August 1980 Soviet exercise of which I was unaware:

According to an August 2 CIA brief, the Soviet Union had carried out a command
post exercise in the Transcaucasus Military District in the last week of July. This exercise was the first simulated ground and air operation against Iran since the overthrow of the Shah. The exercise posited Iran as the primary enemy and included the rapid movement of troops across Iran, the use of air power, and the contingency use of tactical nuclear weapons. The objective of the scenario was the Persian Gulf area. On August 6, a CIA brief reported that a second command post exercise simulating a Soviet invasion of Iran had occurred.