[HGabor]

The 421° assault regiment was the Yugoslav detachment of the 17 VA, 10 GvShAD, 165 GvShAP after December, 1944. (Soviet pilots remained listed under the 165 GvShAP.) Ml.L-t Konstantin Nikolaevich Sidelnikov (1922-) was a soviet pilot, so he belonged to the 165 GvShAP. On March 14, 1945 the soviet 17th Air Army lost more than 15 IL-2s in the Lake Velencei area in Hungary, but none of them was from the 165 GvShAP.

Around March 14, 1945 the 3 regiments (165, 166, 167 GvShAP) of the 10 GvShAD lost 4 IL-2s on March 12, 1945 (IL-2, S/N: 9912, 1871196, 1872289, 1879095) and 2 on March 17, 1945 (IL-2, S/N: 1871190, 1871588). No permanent loss recorded on March 14, 1945 in the 10 GvShAD.

On March 14, 1945 Ml.L-t Konstantin Nikolaevich Sidelnikov in the formation of four 165 GvShAP IL-2s attacked the Valpovo area in Yugoslavia when their flight was attacked by 4 Bf 109s. He managed to down one of them, but I have no record of his loss. If he had to make a force landing after the dogfight, then his plane was not lost, but repaired afterwards and remained in combat service. I hope this helps.

Gabor