The aggregated mobile forces were formed into three separate Armies, on the basis of an elaborate tabular statement drawn up by the Chief of the Prussian General Staff.
The Ist Army, under the command of General von Steinmetz, consisted of, in the first instance, only the VIIth and VIIIth Corps, with one Division of cavalry; 60,000 men all told. It was ordered to assemble at Wittlich and form the right wing.
The IInd Army, under the command of Prince Frederick Charles, consisted of the IIIrd, IVth, Xth, and Guard Corps, with two Divisions of cavalry. Assembling in the vicinity of Homburg and Neunkirchen, it was to form the centre, with a strength of 134,000 men.
The IIIrd Army, under the command of the Crown Prince of Prussia, consisted of the Vth and XIth Prussian, and the Ist and IInd Bavarian Corps, the Würtemberg and Baden Field Divisions, with one Division of cavalry. Its approximate strength was 130,000 men; it was to constitute the left wing, and to concentrate about Landau and Rastatt.
The IXth Corps, consisting of the 18th and the Hesse Divisions, was along with the XIIth Royal Saxon Corps to form a reserve of 60,000 men in front of Mayence, for the reinforcement of the IInd Army to a strength of 194,000 men.
The three Armies numbered together 384,000 men.
There still remained the Ist, IInd, and VIth Corps, numbering 100,000 men; but they were not at first included, as railway transport for them was not available for three weeks to come. The 17th Division and certain bodies of Landwehr troops were detailed to defend the coasts.
It is apparent that numerically the German armies were considerably superior to the French. Inclusive of the garrisons and reserves about one million of men and over 200,000 horses were on the ration list.
On the night of July 16th the Royal order for mobilization was issued, and when his Majesty arrived in Mayence fourteen days later, he found 300,000 men assembled on the Rhine and beyond.
The plan of campaign submitted by the Chief of the General Staff, and accepted by the King, proves that officer to have had his eye fixed, from the first, upon the capture of the enemy's capital, the possession of which is of more importance in France than in other countries. On the way thither the hostile forces were to be driven as persistently as possible back from the fertile southern provinces into the more confined background to the north. But beyond everything the plan of campaign was based on the resolve to attack the enemy at once, wherever found, and keep the German forces always so compact that this could be done with the advantage of superior numbers. The specific dispositions for the accomplishment of those objects were left to be adopted on the spot; the advance to the frontier was alone pre-arranged in every detail.