Vassiltchikov's workplace, the A.A., was a gathering place for civilian members of the anti-Nazi resisters, including Adam von Trott zu Solz, who was a member of the Kreisau Circle, the leaders of the 20 July Plot to kill Adolf Hitler. They had to hide their activities from Nazi SS General, Franz Six, von Trott zu Solz's A.A.'s Reich Security Office contact, a convicted Nuremberg trial war criminal responsible for crimes against humanity as one of the leaders of Einsatzgruppen B's Vorkommando Moskau active in Smolensk.