“France!” came the reply.
“What do you do here?” asked the Russian officer.
“You’ll soon see!” was the answer; and the bold officer turned rein, to report to his superiors that the long-expected invasion had begun at last. His troopers emptied their carbines in the direction of the French party as they rode away, but apparently without effect; and the Voltigeurs did not reply, Napoleon having issued orders that there was to be no firing except in case of extreme necessity. The bridges were completed by about 1 a.m. on the 24th, and Davout’s corps began to defile across. There was no resistance; the only approach to fighting consisted in the interchange of a few shots between the advanced French troops and the rear-guards of the retreating Russian cavalry regiments. The day broke as the passage was in progress: it continued practically without intermission all through the 24th and 25th. As a military spectacle it has, perhaps, never been surpassed; but the ease with which it had been effected was probably by no means entirely pleasing to Napoleon. He must have been unpleasantly conscious that the Russians had no intention of delivering themselves into his hands, though he probably hoped that they would stand to fight in advance of Vilna.
In the morning of the 24th Davout’s 1st Light Cavalry Brigade, under Pajol, occupied Kovno, expelling the Cossack squadron which was the only garrison; and in the afternoon Napoleon himself transferred his head-quarters thither. He ordered a permanent pile bridge to be constructed at the ferry, and threw another bridge over the Vilia, just above its confluence with the Niemen.
The news of the invasion reached Alexander the same evening while he was at a garden party at General Bennigsen’s mansion near Vilna. Next day he announced it to his army in a proclamation, and to the nation at large in another, addressed to Marshal Saltikov, Military Governor of St. Petersburg. The tone of both was worthy of the occasion, and contrasted strongly with the arrogant and theatrical ring of that of Napoleon.
Orders were issued to all the corps commanders to retreat on Sventsiani. It was recognised that Platov alone could hardly achieve any serious damage to Napoleon’s communications, and he also was directed to retire on Sventsiani by way of Lida and Smorgoni. Bagration was warned not to allow himself to be cut from Minsk. All the orders reached their destination safely, except those to Major-General Dorokhov who, with the advance-guard of the 4th Corps, was at Orani, south-west of Vilna. The 3rd and 4th Corps retired leisurely to the suburbs of Vilna, which Barclay did not intend to evacuate until it became absolutely necessary.
By the evening of the 25th the whole French army was over the Niemen and pushing forward to Vilna. Murat opened the march with the 1st and 2nd Cavalry Corps. Behind were the 1st and 3rd Corps, the 3rd Cavalry Corps, and the Imperial Guard, while the 2nd Corps had crossed the Vilia at Kovno and was marching along its right bank, thus forming the flank-guard of the advance on Vilna, and threatening to cut off Wittgenstein towards Keidani. Davout and Ney had each detailed a foreign regiment to guard Kovno and the bridges. The 10th Corps was ordered to advance from Tilsit upon Rossieni, sweeping the right bank of the Niemen, and thus clearing the course of the river for Baste’s supply flotillas, which were now collecting at Tilsit, whence they were pushed forward to Kovno.
There was practically no fighting on the march to Vilna. The thin chain of Russian cavalry posts steadily retired as the French pressed forward: only a few shots were fired from time to time. Napoleon hoped for a battle at Vilna and the troops made forced marches day after day to attain the desired end, at great cost to themselves, for the weather was sultry, the roads were bad, and the provision trains were already falling to the rear. The men began to leave the ranks in order to forage for supplies, and the horses, ill-fed and over-worked, broke down and died in great numbers. Even the artillery was ill-horsed from the first, and the officers were forced to scour the country for draft animals, often with very little success. Barclay was in position before Vilna with the 3rd Corps and most of the 4th, and Baggohufwudt was in touch to the north; but Alexander and his suite had already left for Sventsiani, and Barclay was merely waiting until the French began to close. The stores which could not be carried off were destroyed, and at 4 a.m. on the 28th the 3rd and 4th Corps began to defile through the town. Barclay and his staff left about 1 p.m.; and the rear-guard followed, burning the bridge over the Vilia. Bruyère’s cavalry division, which was heading the French advance, came through the town before Barclay’s cavalry rear-guard was quite clear of the suburbs; and its leading regiment, the 8th Hussars, was charged and driven back, with the loss of several prisoners, by the Cossacks of the Imperial Guard. The Russian columns were well on their way to Sventsiani, and after three days of forced marching in tropical weather the French impulse had expended its force.