The Fourth _Corps d'Armée_, commanded by Lieutenant General Count GÉRARD, consisted of the Twelfth Infantry Division, under Lieutenant General Baron PECHEUX; of the Thirteenth Infantry Division, under Lieutenant General Baron VICHERY; of the Fourteenth Infantry Division, under Lieutenant General DE BOURMONT; and of the Sixth Light Cavalry Division, under Lieutenant General MAURIN; with 4 Batteries of Foot, and 1 of Horse, Artillery. This Corps occupied Metz, Longwy, and Thionville, and formed the basis of the Army of the Moselle; but it was now decided that it should approach the Sambre, and unite itself with the Grand Army. The Sixth _Corps d'Armée_, commanded by Lieutenant General Count LOBAU, consisted of the Nineteenth Infantry Division, under Lieutenant General Baron SIMMER; of the Twentieth Infantry Division, under Lieutenant General Baron JEANNIN; of the Twenty-First Infantry Division, under Lieutenant General Baron TESTE; with 4 Batteries of Foot, and 1 of Horse, Artillery. This Corps was assembled in and around Laon. The four Corps forming the Reserve Cavalry were placed under the command of Marshal Count GROUCHY. The First, commanded by Lieutenant General Count PAJOL, consisted of the Fourth Cavalry Division (Hussars), under Lieutenant General Baron SOULT; and of the Fifth Division (Lancers and _Chasseurs_), under Lieutenant General Baron SUBERVIE; with 2 Batteries of Horse Artillery. The Second Corps, commanded by Lieutenant General Count EXCELMANS, consisted of the Ninth Division (Dragoons), under Lieutenant General STROLZ; and of the Tenth Division (Dragoons), under Lieutenant General Baron CHASTEL; with 2 Batteries of Horse Artillery. The Third Corps, commanded by Lieutenant General Count DE VALMY (KELLERMANN), consisted of the Eleventh Division (Dragoons and _Cuirassiers_), under Lieutenant General Baron L'HERITIER; and of the Twelfth Division (Carabiniers and _Cuirassiers_), under Lieutenant General ROUSSEL D'HURBAL; with 2 Batteries of Horse Artillery. The Fourth Corps, commanded by Lieutenant General Count MILHAUD, consisted of the Thirteenth Division (_Cuirassiers_), under Lieutenant General WATHIER; and of the Fourteenth Division (_Cuirassiers_), under Lieutenant General Baron DELORT; with 2 Batteries of Horse Artillery. The principal portion of the Reserve Cavalry lay in cantonments between the Aisne and the frontier. * * * * * The Infantry of the Imperial Guard consisted of the 1st and 2nd Regiments of Grenadiers, under Lieutenant General Count FRIANT; of the 3rd and 4th Regiments of Grenadiers, under Lieutenant General Count ROGUET; of the 1st and 2nd Regiments of _Chasseurs_, under Lieutenant General Count MORAND; of the 3rd and 4th Regiments of _Chasseurs_, under Lieutenant General Count MICHEL; of the 1st and 3rd Regiments of _Tirailleurs_, under Lieutenant General Count DUHESME;