Happy new year!
I've been under radio silence for most of December due to Xmas and house building getting in the way but I've had the time to do a little research. I share the concerns of Falcon about over-stepping the Sigs remit regarding dates but i think this only really applies to the former Soviet states.
I've tried to find out what equipment was in use in each country in 1991 that has not already been claimed on this page -
http://uamf.org.uk/viewtopic.php?f=204&t=12846
Hopefully people will find it useful and we can fill in some of the blanks!
Armenia
Although the airforce was only officially created in 1992 it is reported that Armenia took control of 1 Mig 25 and 2 SU-25, and some Mi 24s in 1991.
They also converted civilian Mi 8 to bomb civilian targets in their 1990 conflict.
Source
Azerbaijan
SU-24
Mig 25
Mi 24
T-55 tank
Source
Georgia
Only had a national guard, no aircraft that I can track down in 1991. They obtained trainers in 1992.
Edit - They had SU 25 airframes in the factory that built them which happened to be based in Georgia. These were later given to the Georgian air force
Moldova
Mig 29
Source
Kyrgyzstan, Tajikistan
Neither had any aircraft in 1991 - All air defence was supplied by the Russians at this time
Main military force in Tajikistan was the Russian 201st Motorised Rifle Division - A semiautonomous pro-Communist Russian division.
Source
Turkmenistan
Land forces made up of the Kushka and Kizil-Arvat divisions.
Airforce remained under Russian command until 1994, however it did have a number of disassembled su25 airframes in storage which later formed part of the airforce.
Source
Uzbekistan
The Uzbek airforce was not official until 1992 however it started operating in 1991 and with a large number of aircraft.
SU-27 B/C
Mig 29 A/B
SU-24 C
SU-17 J/K
SU-25 A/B
Mi 24 D/E
Mi 8
Mi 17
Mi 26
Mi 6
Source
Source
SU-25 Source