1936-1945
| 1936 | Merger of Rheinmetall and Borsig into Rheinmetall-Borsig AG |
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| 1938 | Company headquarters moved from Düsseldorf to Berlin |
| 1940 | German army gaining increasing control of arms production |
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| 1944 - 1945 | Production facilities damaged and destroyed by air raids, hence production relocated to many other places in what was to become the GDR and what is today Poland |
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| 1945 | End of WW II followed by production ban imposed by the military government |
| 1950 | Start-up in Düsseldorf of barely successful nonmilitary products |