In 1939, he joined the German Navy, working in the High Command as a staff judge and advisor for international law.

Berthold's apartment at Tristanstraße in Berlin, where his brother Claus also lived for some time, was a meeting place for the 20 July conspirators, including their cousin Peter Yorck von Wartenburg.
As Claus had access to the inner circle around Hitler, he was assigned to plant a bomb at the Führer's briefing hut at the military high command in Rastenburg, East Prussia, on 20 July 1944.
Claus then flew to Rangsdorf airfield south of Berlin where he met with Berthold.
They went together to Bendlerstraße, which the coup leaders intended to use as the centre of their operations in Berlin.

Hitler survived the bomb blast and the coup failed.
Berthold and his brother were arrested at Bendlerstraße the same night.
Claus was executed by firing squad shortly afterwards.

After his arrest, Stauffenberg was questioned by the Gestapo about his views about the "Final Solution to the Jewish Question".
Stauffenberg told the Gestapo that “he and his brother had basically approved of the racial principle of National Socialism, but considered it to be 'exaggerated' and 'excessive'” Stauffenberg went on to state,
The racial idea has been grossly betrayed in this war in that the best German blood is being irrevocably sacrificed, while simultaneously Germany is populated by millions of foreign workers, who certainly cannot be described as of high racial quality.

Berthold was tried in the Volksgerichtshof ("People's Court") by Roland Freisler on 10 August and was one of eight conspirators executed by strangulation, hanged in Plötzensee Prison, Berlin, later that day.
 Before he was killed Berthold was strangled and then revived multiple times.
The entire execution and multiple resuscitations were filmed for Hitler to view at his leisure.
In 1939, he joined the German Navy, working in the High Command as a staff judge and advisor for international law.
Berthold's apartment at Tristanstraße in Berlin, where his brother Claus also lived for some time, was a meeting place for the 20 July conspirators, including their cousin Peter Yorck von Wartenburg. As Claus had access to the inner circle around Hitler, he was assigned to plant a bomb at the Führer's briefing hut at the military high command in Rastenburg, East Prussia, on 20 July 1944. Claus then flew to Rangsdorf airfield south of Berlin where he met with Berthold. They went together to Bendlerstraße, which the coup leaders intended to use as the centre of their operations in Berlin.
Hitler survived the bomb blast and the coup failed. Berthold and his brother were arrested at Bendlerstraße the same night. Claus was executed by firing squad shortly afterwards.
After his arrest, Stauffenberg was questioned by the Gestapo about his views about the "Final Solution to the Jewish Question". Stauffenberg told the Gestapo that “he and his brother had basically approved of the racial principle of National Socialism, but considered it to be 'exaggerated' and 'excessive'” Stauffenberg went on to state,
The racial idea has been grossly betrayed in this war in that the best German blood is being irrevocably sacrificed, while simultaneously Germany is populated by millions of foreign workers, who certainly cannot be described as of high racial quality.
Berthold was tried in the Volksgerichtshof ("People's Court") by Roland Freisler on 10 August and was one of eight conspirators executed by strangulation, hanged in Plötzensee Prison, Berlin, later that day.  Before he was killed Berthold was strangled and then revived multiple times. The entire execution and multiple resuscitations were filmed for Hitler to view at his leisure.
Berthold Schenk Graf von Stauffenberg