Kent Masterson Brown's "Retreat from Gettysburg: Lee, Logistics, and the Pennsylvania Campaign" offers the first comprehensive history of General Robert E. Lee's logistical nightmare following the Army of Northern Virginia's defeat at Gettysburg on July 3, 1863. The book follows Lee through enemy territory, moving tens of thousands of troops, many of whom are wounded, and an almost equal amount of livestock, and more than fifty-seven miles of supply trains over mountains, through rain and deep mud, to safety. Gettysburg is placed in a broad historical perspective, situating the battle as the culmination of Lee's invasion of Pennsylvania.