Thank you very much for your summary of the short existence of KGr. z.b.V. 21 and 22, Larry. The place and date of formation, as well as the two Staffel organisation, were all hitherto unknown to me.
The losses on 24 December were caused primarily by an armoured raid by the Soviet 24th Tank Corps, see
https://en.wikipedia.org/wiki/Tatsin...field#Overview
and
https://upload.wikimedia.org/wikiped...tle_Saturn.png
I was going to suggest that the four aircraft of Nachtlehrgang 3 that were reported have arrived in the Crimea might have been sent to reinforce the existing Ju 86 transport units. Effectively, you got there first

I will add here that the biography of Oberleutnant Aicher from your and Doug's great
Career Summaries database would suggest that Nachtfluglehrgang 3
did function as a Ju 86 combat unit, though later in the war. 3./Einsatzgruppe BFS 2, the apparent successor unit of Nachtfluglehrgang 3, was a Ju 86 anti-partisan Staffel.
"AICHER, Egon. (DOB: 14.07.18 in Rosenheim). (W.B.K. München II). 1940 assigned to Lg.Kdo. III.26.07.41 trf to FFS C 8 as an instructor. 01.07.42 RDA as Oblt.
15.02.43 Oblt., Staka 2./Nachtfluglehrgang 4 (to 05.04.43). 20.05.43 trf to BFS 3 Prag-Rusin as an instructor.
11.06.43 Oblt., Staka Nachtfluglehrgang 3 (to 05.09.43). 06.09.43 Oblt., appt Staka 3./Einsatzgruppe BFS 2 (to 16.11.43). 17.11.43 Oblt., appt Staka 3./Eins.Gr.d.2.Fl.Schuldiv. (to 14.06.44). 15.06.44 trf to FFS B33 as an instructor. 03.08.44 trf to NJG 101 as an instructor. 11.10.44 trf to 3./NJG 101. 06/07.12.44 Oblt., 3./NJG 101. 04.45 MIA - in Czechoslovakia? Credited with one victory. [Name changed from AICHLER]"
Kind regards,
Dan