This book is about the First Battle of Bull Run, which took place on July 21, 1861, near Manassas, Virginia. It covers the background of the Civil War, the strategies and tactics of both the Union and Confederate armies, the key figures involved, and the impact of the battle on the war and American history. Additionally, it serves as a guide to the Manassas National Battlefield Park, providing information on the park's features and the historical significance of its landmarks.