The fourth and last meeting took place in March 1940 in Krakow.[5] According to some historians, it was part of the Zakopane Conference. This event was described by General Tadeusz Bór-Komorowski, commander of Armia Krajowa in his book Armia Podziemna (The Secret Army). In it, he describes how a special delegation of NKVD came to Krakow, which was going to discuss with Gestapo how to act against the Polish resistance.