Visiting in these days the Musee de l'Armee at Paris, i observed among the different objects and interactive parts the war movements during the franco-prussian war. I discovered there was a plan planned by the recently dead general Niel before regarding a preemptive French strike in Renania, but it was discharged in favor of a more attendist stance. Because of the overhelming numerical and strategical superiority of the German coalition, surely things will not ended differently from OTL, but what instead if the Niel plan was put in charge by the French? Maybe Sedan could be avoided at least?