This, too, was the earnest desire of Napoleon. The advance from the Vistula to the Niemen and from the Niemen to the Dwina had been successfully carried forward--but at what a cost! "Since we have crossed the Niemen," wrote the artist Adam, who was at the viceroy's headquarters, "the Emperor and his entire army are occupied by a single thought, a single hope, a single wish--the thought of a great battle." Men talked of a great battle as of a great festival. If the Russian army in its own territory shriveled as it did before the summer heat by sickness and desertion, it may be imagined how that of the French dwindled. Their terrible sufferings could be ended only by a battle. Heat, dust, and drought wrought havoc in their columns; the pitiless northern sun left men and animals with little resisting power; the flying inhabitants devastated their fields, the horses and oxen gorged themselves on the half-rotten thatch of the abandoned huts, and died by the wayside; the gasping soldiery had no food but flesh. Dysentery raged, and soldiers died like flies. For a time Saint-Cyr's Bavarian corps lost from eight to nine hundred men a day, and it was by no means a solitary exception. Such facts account for the dilatoriness of Napoleon's movements in part; for the rest, his imperial plans demanded that he should organize all the territories in his rear, and he gave himself the utmost pains to do so. Besides, he had never before had a task so heroic in all its dimensions, and every detail of military and political procedure required time and care in fullest measure, the more so when preparing for a decisive, uncommon battle.
Vitebsk and Smolensk occupy analogous positions on the rivers Dwina and Dnieper, the former of which is to the westward and flows north; the latter, farther inland, flows in the opposite direction into the very heart of Russia. Barclay had planned to await Bagration at Vitebsk, and Napoleon, arriving on July twenty-seventh, hoped for a decisive battle there. But Davout's movements drove Bagration farther eastward, and Barclay, instead of waiting, hurried to Smolensk, where the junction was effected. This compulsory pursuit had, as communications then were, thrown the extreme wings of Napoleon's army virtually out of reach, the Prussians being near Riga, and the Austrians in Volhynia. The long, thin line of his center must be, therefore, drawn in for safety; and since the character of the country had improved, he determined to concentrate near Vitebsk, and recuperate his troops in the comparatively pleasant land which environs that city. Both commander and officers were at first so disheartened that they contemplated remaining for the season, Murat alone remonstrating; but Napoleon said three years were necessary for the Russian war. Such counsels did not long prevail; with new strength came the old daring, and orders were sent both to Macdonald and the Prussians on the left, and to the Austrians under Schwarzenberg on the right, which were indicative of a great project. Napoleon's prestige among the Poles had in fact shrunk along with his army. The latter he could not recruit, but the former he must repair at any hazard; this could be done only by what he designated to Jomini as a "good battle." The success of the minor engagements to right and left, incident to concentration, was encouraging for such a speedy and overwhelming triumph.