The junction of the several Corps on the same day, and almost at the same hour (with the exception of the Fourth, which joined the next day), displayed the usual skill of NAPOLEON in the combination of movements. Their leaders congratulated themselves upon these auspicious preparations, and upon finding the "Grand Army" once more assembled in "all the pomp and circumstance of glorious war:" the appearance of the troops, though fatigued, was all that could be desired; and their enthusiasm was at the highest on hearing that the Emperor himself, who had quitted Paris at three o'clock on the morning of the 12th, and passed the night at Laon, had actually arrived amongst them. Upon the following day, the French Army bivouacked on three different points. The Left, consisting of D'ERLON's and REILLE's Corps, and amounting to about 44,000 men, was posted on the right bank of the Sambre at Solre sur Sambre. The Centre, consisting of VANDAMME's and LOBAU's Corps, of the Imperial Guard, and of the Cavalry Reserves, amounting altogether to about 60,000 men, was at Beaumont, which was made the Head Quarters. The Right, composed of GÉRARD's Corps and of a Division of Heavy Cavalry, amounting altogether to about 16,000 men, was in front of Philippeville. The bivouacs were established in rear of some slight eminences, with a view to conceal their fires from the observation of the Enemy. The Army, while thus assembled, on the eve of opening the Campaign, received through the medium of an _Ordre du Jour_ the following spirit-stirring appeal from its Chief:-- "NAPOLEON, by the Grace of God, and the Constitutions of the Empire, Emperor of the French, etc., to the Grand Army, "At the Imperial Head Quarters, Avesnes, June 14th, 1815. "Soldiers! this day is the anniversary of Marengo and of Friedland, which twice decided the destiny of Europe. Then, as after Austerlitz, as after Wagram, we were too generous! We believed in the protestations and in the oaths of Princes, whom we left on their thrones. Now, however, leagued together, they aim at the independence, and the most sacred rights of France. They have commenced the most unjust of aggressions. Let us, then, march to meet them. Are they and we no longer the same men? "Soldiers! at Jena, against these same Prussians, now so arrogant, you were one to three, and at Montmirail one to six! "Let those among you who have been captives to the English, describe the nature of their prison ships, and the frightful miseries they endured.