He was a German cavalry officer from Wehrmacht i.e German army. He was an anti Nazi activist and was willing to assassinate Hitler by shooting with a pistol. He was to attend a meeting with Hitler as an aide with his seniors. Accordingly, he went prepared with a loaded 7.65 mm pistol ( probably Walther make) concealed in his trouser pocket. However, the aides were not allowed into the conference room by SS guards owing to official orders. However, the plan was not detected and later it resulted in plot 20 July 1944 involving Carl Stauffenburg. Breiten Busch thus escaped prosecution and after war, he worked in forestry.