Following the German surrender after the Battle of Stalingrad, he became a member of the National Committee for a Free Germany.

After the war, Adam joined the Nazi Party and participated in the Beer Hall Putsch.

[1]: 144  On 31 January 1943, now a colonel, Adam was captured by the Soviet Army after the surrender at Stalingrad, where he was interrogated by Nikolay Dyatlenko.

[2] While a prisoner of war, he went to the Central Anti-Fascist School at Krasnogorsk and became a member of the National Committee for a Free Germany.

And because of this, we did not recognize the deeper reasons for the defeat on the Volga, superiority of the socialist state and social system, whose sharp sword was the Soviet army.