Then trumpets sang the charge, and the cavalry thundered out of the wood, followed by the infantry and the artillery.
At the same time, another powerful division that had been moved forward by Sheridan, charged, while those in front increased their fire.

The unfortunate Southern army was overwhelmed by troops who had moved forward in such complete unison.

They were swept out of their earthworks, driven from their fortified hill, and those who did not fall or were not taken were sent in rapid flight down the valley.
The battle was short.

Completeness of preparation and superiority in numbers and resources made it so.

Early and what was left of his army had no choice but the flight they made.