Battle of Brandy Station, Va.
While Union forces were besieging points along the lower Mississippi River, Confederate Gen. Robert E. Lee was beginning to look for an opening to strike at the North. On June 9, 1863, Union cavalry corps unleashed a surprise attack on Je.B. Stuart's Confederate cavalry forces at Brandy Station near the Rappahannock River in Virginia. The fighting rage for an entire day and marked the largest battle of the war predominantly pitting cavalry against each other.
Though the momentum swung repeatedly from one side to the other, Union fighters failed to detect a major infantry camp of Lee's nearby in Culpeper, Va. The fighting at Brandy Station would mark the prelude to Lee's push northward into Pennsylvania that would culminate in the Battle of Gettysburg in July 1863.