British Foreign Secretary Anthony Eden used the failure of the EDC to argue for independent West German rearmament and West German NATO membership. Thanks in part to Adenauer's success in rebuilding West Germany's image, the British proposal met with considerable approval. In the ensuing London conference, Eden assisted Adenauer by promising the French that Britain would always maintain at least four divisions in the British Army of the Rhine as long as there was a Soviet threat, with the strengthened British forces also aimed implicitly against any German revanchism. Adenauer then promised that Germany would never seek to have nuclear, chemical and biological weapons as well as capital ships, strategic bombers, long-range artillery, and guided missiles, although these promises were non-binding. The French had been assuaged that West German rearmament would be no threat to France. Additionally, Adenauer promised that the West German military would be under the operational control of NATO general staff, though ultimate control would rest with the West German government; and that above all he would never violate the strictly defensive NATO charter and invade East Germany to achieve German reunification.