Where did the largest cavalry battle of the American Civil War take place?

Question

On what date?

Answer 1

Brandy Station, Virginia on June 9, 1863. The largest in FL was the BATTLE OF OLUSTEE. :)

Answer 2

Prior to Lee's invasion of the North, he was trying to shield his move from the Army of the Potomic using his cavalry. The Yanks, on the other hand, were trying to keep tabs on the reb, thus the clash at Brandywine.... the slashing of blades as they ran amongst each other...