 Significantly enlarged under Nazi rule, it was used by several departments of the "Oberkommando der Wehrmacht" (OKW) from 1938, especially the "Oberkommando des Heeres" and the "Abwehr" intelligence agency.The building is notable as the headquarters of a resistance group of Wehrmacht officers who carried out the 20 July plot against Adolf Hitler in 1944.As the leaders of the conspiracy were summarily shot in the courtyard, the Bendlerblock also includes the Memorial to the German Resistance.