総統大本営
In 1943, then-captain Szokoll was introduced in Berlin to colonel Claus von Stauffenberg, one of the heads of the resistance movement in the Third Reich, by the Austrian lieutenant colonel Robert Bernardis and got involved with them by monthly visits of Robert Bernardis in Vienna since February 1944. When the 20 July plot seemed to have succeeded after Stauffenberg placed a bomb in the Führer Headquarters "Wolfsschanze", he was with Colonel Heinrich Kodre, the "Chief of Staff" in Vienna, one of the resistance's man of Stauffenberg, who executed with Colonel Kodre the orders to seize all authorities and arrest the leading members of SS and the Nazi administration.