The German nuclear energy project was an endeavor by scientists during World War II in Nazi Germany to develop nuclear energy and an atomic bomb for practical use. Unlike the competing Allied effort to develop a nuclear weapon the German effort resulted in two rival teams, one working for the military, the second, a civilian effort co-ordinated by the German Post Office.
The nuclear research effort most widely discussed was that of the Kaiser Wilhelm Institute team led by the physicist Werner Heisenberg. The second was a military team under the scientific leadership of Prof. Kurt Diebner. This military team was also associated with Dr. Paul Harteck, who helped to develop the gaseous uranium centrifuge invented by Dr. Erich Bagge in 1942. Their team was part of the German Army (Heereswaffenamt Forschungsstelle E), the Kriegsmarine (navy) had a subsidiary team looking at nuclear propulsion for U-boats under Dr. Otto Haxel. Konteradmiral Karl Witzell and Konteradmiral Wilhelm Rein were military leaders of the naval nuclear project.
The intentions of Heisenberg's team are a matter of historical controversy, centering on whether or not the scientists involved were genuinely attempting to build an atomic bomb for Nazi dictator Adolf Hitler. The project was not a military success by any measure.