Even as Sickles shouted the order for his army to continue the advance, a deep thunder exploded to his front. It started in the middle, several batteries firing simultaneously, and then spread like a string of firecrackers along the entire front, thunderclap building on thunderclap into a continuous roar.
He was a man of courage, and yet instinctively he hunched over when, three seconds later, the blizzard of solid shot and shrapnel swept the crest of the hill. Shells detonated; solid shot skipped and screamed; skirmishers fell flat on their faces, hugging the ground; branches were torn from apple trees, whirling into the air. One of his staff went down, his horse torn nearly in half, screaming horribly as it thrashed about, its legs tangled into its spilled intestines.
The division he had ordered forward was coming up, the men protected by the low rise, but more than one fell from airbursts, from broken branches that drove through the ranks like javelins, thousands of splinters from trees raining down on them.
What is this? he wondered. How? Yet the sight before him, though cloaked with heavy smoke, was clear enough. The bulk of Lee's artillery was deployed here, in the center between the two main roads they were using for their retreat. Was he turning to fight?
The division came up, columns shaking back out into battle lines, men hunching low as they reached the crest and then hesitated, not sure what to do next.
He could not leave this in his center, cutting his advance along the roads. If Lee was retreating, was this a throwaway gesture? Perhaps the guns captured at Union Mills? Or were there infantry in the woods beyond, ready to support?
His own artillery was coming up, but already he could see they would be outnumbered. It would take time to bring them forward, organize them on the reverse slope, then push them all up at once.
Could he take this directly? He calculated the odds. He would never be so foolish as to send men into a frontal assault against gun's. Though he cared little for Henry Hunt, he thought of him at this moment, wished he were here to offer advice.
Birney was by his side, wide-eyed. The faster of the gunners had reloaded, and he noted that it had taken them time, a minute or more. These were not well-practiced men.
"Birney, take your men forward!" Dan shouted. "But for God's sake, don't get into canister range. Stop before then, get your men firing, and sweep those bastards. If Lee wants to give us back our guns, by God, we'll take 'em!"
The battle line swept forward into the valley.