The wherries sent from Danzig to the Niemen were often snapped up by British cruisers, and the carriage of stores from the Niemen entailed so frightful a waste of horseflesh that only the most absolute necessaries could keep pace with the army in its rapid advance.

The men were thus left without food except such as marauding could extort.
In this art Napoleon's troops were experts.

Many miles of country were scoured on either side of the line of march, and the Emperor, on reaching Vilna, had to order Ney to send out cavalry patrols to gather in the stragglers, who were committing "horrible devastations" and would "fall into the hands of the Cossacks." At Vilna the Grand Army met with a more cheering reception than heretofore.

Deftly placing his Polish regiments in front and chasing the retiring Russians beyond the town, Napoleon then returned to find a welcome in the old Lithuanian capital.

The old men came forth clad in the national garb, and it seemed that that province, once a part of the great Polish monarchy, would break away from the empire of the Czars and extend Napoleon's influence to within a few miles of Smolensk.[261] The newly-formed Diet at Warsaw also favoured this project: it constituted itself into a general confederation, declared the Kingdom of Poland to be restored, and sent a deputation to Napoleon at Vilna begging him to utter the creative words: "Let the Kingdom of Poland exist." The Emperor gave a guarded answer.