"-- June 7 - Fighting around Czestochowa destroys the Jasna Gora, home to the Black Madonna. 300 members of the 4th and 16th Parachute Regiments break out to the east. The 1st Parachute Regiment surrenders, and the 6th Pomerian [sic] Air Assault Division ceases to exist. The survivors of the Polish 12th Tank Division and Polish 2nd Motorized Rifle Division escape up the Vistula." According to this timeline:
https://i.4pcdn.org/tg/1433519198937.pdf. Black Madonna has them linking up with the 12th.
On July 9, tactical nukes start flying and NATO withdraws to Germany.
The 2nd MRD was mauled and converted to horse cavalry. In 2000, it is in Gdynia with 200 cavalry. (East European SB).
12th Cavalry was formed from the survivors of the 11th Tank Division (Koscierzyna/Gniew/Tczew, 1500 cavalry). (EESB)
If you'd like, you can assume that the 12th Cavalry also included remnants from the 12th Tank Division as well as the 11th, which would account for the numbering of the cavalry division. This would place the survivors of the 6th as elements of the 12th Cavalry and/or the 2nd. With the nukes flying not long after the survivors broke out of Czestochowa, I wouldn't have them being maintained by higher HQ as a special cadre. In the crash of civilization, I'd have them absorbed into the 12th or 2nd, perhaps as an elite squadron, but there wouldn't be too many left by 2000.