One Division was ordered to the Spanish frontier as a corps of observation; only such troops as were absolutely necessary were left in Algiers and in Civita Vecchia; Paris and Lyons were sufficiently garrisoned. The entire remainder of the army: 332 battalions, 220 squadrons, 924 cannon, in all about 300,000 men, formed the army of the Rhine. This was divided into eight Corps, which, at any rate in the first instance, were to be directed by one central head, without any kind of intervention. The Imperator himself was the only person to assume this difficult task; Marshal Bazaine was to command the army as it assembled, until the Emperor's arrival.
It is very probable that the French were counting on the old dissensions of the German races. True, they dared not look upon the South Germans as allies, but they hoped to reduce them to inactivity by an early victory, or even to win them over to their side. Prussia was a powerful antagonist even when isolated, and her army more numerous than that of the French, but this advantage might be counterbalanced by rapidity of action.
The French plan of campaign was indeed based on the delivery of unforeseen attacks. The strong fleets of war and transport ships were to be utilized to land a considerable force in Northern Prussia, and there engage a part of the Prussian troops, while the main body of the army, it was supposed, would await the French attack behind the fortresses on the Rhine. The French intended to cross the Rhine at once, at and below Strassburg, thus avoiding the great fortresses; and also, at the start, preventing the South-German army, which was destined to defend the Black Forest, from uniting with the North-Germans. To execute this plan it would have been imperative to assemble the main forces of the French army in Alsace. Railway accommodation, however, was so inadequate that in the first instance it was only possible to carry 100,000 men to Strassburg; 150,000 had to leave the railways near Metz, and remain there till they could be moved up. Fifty thousand men
