June 1863. The American Civil War was two years old, and the U.S. Army in Virginia was in chaos. Reeling after the recent defeat at Chancellorsville, the Federals, especially the Cavalry Corps, scrambled to regroup. Confederate general Robert E. Lee seized the moment to launch a second invasion of the North. As Lee slipped away, frantic Federal leaders asked, "Where are the Rebels?" At this critical moment, the much-maligned Federal cavalry stepped to center stage. Small but Important Riots is a tactical study of fighting from June 17 to 22, 1863, at Aldie, Middleburg, and Upperville, placed within the strategic context of the Gettysburg campaign. It is based on Robert O'Neill's thirty years of research and access to previously unpublished documents, which reveal startling new information. Since the fighting in Loudoun Valley of Virginia ended in June 1863, one perspective has prevailed - that Brigadier General Alfred Pleasonton, who commanded the Cavalry Corps, Army of the Potomac, disobeyed orders. According to published records, Pleasonton's superiors, including President Abraham Lincoln, Secretary of War Edwin Stanton, and army commander Joseph Hooker, ordered Pleasonton to search for General Robert E. Lee's Army of Northern Virginia during a critical stage of the Gettysburg campaign, and Pleasonton had ignored their orders. Recently discovered documents - discussed in this book - prove otherwise.

This book is an operational and tactical study of cavalry operations in Northern Virginia from September 1862 to July 1863. It examines in detail John Mosby's first six months as a partisan, within the context of the larger threat to the Union capital posed by Jeb Stuart. Previous studies of Mosby's career are largely based upon postwar memoirs. This narrative balances those accounts with previously unpublished official contemporary records left by the Union soldiers assigned to the defense of Washington, D.C. The formation of the Michigan Cavalry Brigade is fully documented, along with the exploits of the brigade in the months before George Custer took command. Largely forgotten events, such as Jeb Stuart's Christmas Raid, the fight at Fairfax Station during Stuart's Ride to Gettysburg, as well as the vital role played by Union general Julius Stahel's cavalry division in the critical month of June 1863 are examined at length.