In January and February 1944, in the wake of the massive assault by the Soviet paramilitary against the Polish AK resistance units Krzyżanowski conducted a series of negotiations with the Germans. In the aftermath of talks with Seidler for Rosenfield of the Nazi German Security Service near Wilejka and Julian Christiansen, the Chief of the Vilnius Abwehr, cooperation between Germans and the AK was agreed upon in the area of Krzyżanowski's units' operation and, according to the report of the local Nazi official: "three sizeable Polish detachments came over to our side and initially also fought well." While Krzyżanowski refused to sign an explicit agreement on cooperation, the secret arrangement was made that the AK would "capture" the armaments and provisions left to them by Germans. As a result, the AK units in the area were re-supplied.