In August 1938, before World War Two, a senior executive for General Motors, James D. Mooney, received the Grand Cross of the German Eagle for his distinguished service to the Reich. "Nazi armaments chief Albert Speer told a congressional investigator that Germany could not have attempted its September 1939 Blitzkrieg of Poland without the performance-boosting additive technology provided by Alfred P. Sloan and General Motors". During the war, GM's Opel Brandenburg plant produced trucks, parts for Ju 88 aircraft, land mines and torpedo detonators for Nazi Germany. Charles Levinson, formerly deputy director of the European office of the CIO, alleged in his book, "Vodka-Cola" extensive collaboration and information sharing between US and German divisions of General Motors during the war.