Of Napoleon's monster army, Marshal Macdonald commanded the left wing; the Austrians were on the right under Schwarzenberg; and the main body consisted of a succession of vast columns commanded by the most famous French generals, including Bessières, Lefebvre, Mortier, Davoust, Oudinot, Ney, Grouchy, King Jerome of Westphalia, Junot, Poniatowski, Regnier, Eugene Viceroy of Italy, etc.; and Murat commanding all the cavalry. Buonaparte led this centre of two hundred and fifty thousand men with his Imperial Guard. To oppose this huge army, composed of numbers and of officers such as the world had not seen before, Alexander had about two hundred and sixty thousand men. He lay at Wilna, with Barclay de Tolly and one hundred and twenty thousand men. In different positions, more northwards, lay Count Essen, Prince Bagration, the Hetman Platoff, with twelve thousand Cossacks; and, watching the Austrian right in Volhynia, lay General Tormasoff, with twenty thousand men. Advancing on them in three vast masses, the French army approached the Niemen--the King of Westphalia directing his march on Grodno, the Viceroy of Italy on Pilony, and Buonaparte himself on Nagaraiski, three leagues beyond Kovno. On the 23rd of June the head of Napoleon's column came upon the Niemen, and saw the other bank covered with vast and gloomy forests. As the Emperor rode up to reconnoitre this scene, his horse stumbled and threw him; and a voice, from the crowd behind him, was heard saying, "A bad omen! A Roman would return!" When the head of the column the next morning crossed the river, a single Cossack issued from the solemn woods, and demanded their reason for violating the Russian soil. The soldiers replied, "To beat you, and take Wilna!" The Cossack disappeared, and left all solitary as before. Three days were required to get the army across, and before they could pitch their tents they were assailed by a violent thunderstorm, accompanied by torrents of rain.