Book excerpt: This Civil War history and guide examines a major turning point in cavalry combat and includes a GPS guided tour of the battlefield. Just before dawn on June 9, 1863, Union soldiers materialized from a thick fog near the banks of Virginia's Rappahannock River to ambush sleeping Confederates. The ensuing struggle, which lasted throughout the day, was to be known as the Battle of Brandy Station—the largest cavalry battle ever fought on North American soil. These events marked a major turning point in the Civil War: the waning era of Confederate cavalry dominance in the East gave way to a confident and powerful Union mounted arm. Historian Eric J. Wittenberg meticulously captures the drama and significance of these events in this fascinating volume. The GPS guided tour of the battlefield is supplemented with illustrations and maps by master cartographer Steven Stanley.