Following the shelling of Fredericksburg, on December 11th, the Union army began to cross on pontoons. On the 12th of December, under cover of the guns and of fog, almost the whole Union army crossed on three pontoons, one near the foot of Hawk street, another just above the car bridge, and one at Deep Run. On the morning of December 13th, General Burnside's army was drawn up in a line of battle from opposite Falmouth to Deep Run. It was, say they who saw the vast army with artillery and cavalry advanced, banners flying and the bayonets of their infantry hosts gleaming as the fog lifted, one of the most imposing sights of the war. General Burnside actually had in line and fought during the day, according to his report, 100,000 effective men. General Lee had 57,000 effectives, ranged along the hills from Taylor, past Snowden, past Marye's Heights, past Hazel Run and on to Hamilton's Crossing. There were preliminary skirminishes of cavalry, light artillery and infantry. The enemy tried to "feel" General Lee's lines. Then, about 10 o'clock, they advanced against the hills near Hamilton's Crossing, where Jackson's Corps was posted, in a terrific charge across a broad plateau between the river and the hills to within a quarter of a mile of the Confederate position, where they broke under terrific artillery and musketry fire. At one o'clock 55,000 men, the whole of Franklin's and Hooker's Grand Divisions advanced again in the mightiest single charge of the Civil War. Stuart and Pelham (he earned that day from Lee the title of "The Gallant Pelham") raked them with light artillery, but nevertheless they forced a wedge through Jackson's lines and had won the day, until Jackson's reserves, thrown into the breach, drove them out and threw back the whole line. As dusk came on, Stuart and Pelham counter charged, advancing their guns almost to the Bowling Green road, and Jackson prepared to charge and "drive them into the river," but was stopped by the heavy Union guns on Stafford hills. [Sidenote: _At Hamilton's Crossing_] During the fiercest part of the battle, "Stonewall" Jackson was on the hill just on the Fredericksburg side of Hamilton's Crossing where Walker's artillery was posted, but toward evening, fired with his hope of driving the Union forces across the river, he rode rapidly from place to place, sending out frequent orders. One of these he gave to an aide. "Captain, go through there and if you and your horse come out alive, tell Stuart I am going to advance my whole line at sunset." It was this charge, mentioned above, which failed.