High Quality Content by WIKIPEDIA articles! Claus Philipp Maria Justinian Schenk Graf von Stauffenberg (15 November 1907 21 July 1944) was a German army officer and Catholic aristocrat who was one of the leading members of the failed 20 July plot of 1944 to kill German dictator Adolf Hitler and remove the Nazi Party from power in World War II Germany. Along with Henning von Tresckow and Hans Oster, he was one of the central figures of the German Resistance movement within the Wehrmacht.