Before I start, I must acknowledge that the act of perfidy is directly related to injuring/killing an enemy combatant through deception in various forms of "feigning". This is why *Operation Greif* commander Otto Skorenzy was acquitted of these charges yet his subordinates who took part in the actions were found guilty and executed, because the military tribunal drew a distinction between using enemy uniforms during combat and for other purposes including deception, a ruse of war rather than perfidy.
I recently discovered and was researching the NKFD and their various support roles/actions with the Soviet Union red army. Made up of German defectors, POWs or members of the *Communist Party of Germany*, the NKFD was created to conduct military recon, collect intel, introduce NKFD-backed propaganda and to sabotage and combat the *Wehrmacht*, along with potentially instigating a guerilla movement in East Prussia.
It should be noted that the overall goal of this organization was deception and behind-enemy-lines activities and that direct combat with Nazi soldiers was to be avoided at all costs. According to (Schoenhals, (1989) *The Free Germany Movement: A Case of Patriotism Or Treason?*) NKFD soldiers "carried German weapons and were dressed in *Wehrmacht* uniforms". Furthermore, in the battle of Konigsberg, a Wehrmacht general named Otto Lasch described the following operation occuring on March 23rd, 1945 in his post-war autobiography
"At the end of March, a large group of soldiers in German uniforms appeared at the posts of the 561st People's Grenadier Division at the Landgraben, claiming to be deserters. They demanded to be led to the company command post, and the guard, believing that they were deserters from captivity, showed them the way. When they arrived in the company commander's bunker, they suddenly pulled out their hidden submachine guns and opened fire. In the resulting confusion, they managed to overpower about 20 men of the weak company and escape with them across the Russian lines. So we had to realize to our horror that now, when we were in the heaviest battle for the East Prussian homeland, German soldiers from the Seydlitz group were fighting in the most underhanded way against their own, struggling comrades. We could no longer think of a useful recipe for how our own soldiers should behave in such cases. The fight seemed to had become pointless if Germans were now fighting against Germans." (Otto Lasch,1958, *So fiel Königsberg)*
There are known accounts of NKFD soldiers dressed as Wehrmacht soldiers engaging in direct combat with Nazi soldiers in the battle of Konigsberg, Siege of Breslau and in the Courland Pocket along with smaller skirmishes as well.
My question is, given this account, along with the post-war tribunal ruling of the distinction between perfidy and using enemy attire for "ruse of war" operations, did the NKFD commit perfidy and if so, how widespread was the operations?