Eh? Force de Frappe started with Vautour bombers with free fall bombs in '55. This wasn't perfect, but neither was the Soviet atomic, later nuclear, capability at that time. Then they added the S2 IRBM - meaning a range of 3,000 to 5,500 km. Hardly the Franco-German border. Then it was Mirage IV, M4 SLIRBMs and the third largest nuclear force in the world. Added to NATO's might, I think that deterred the Russians.