engagement of little strategic or tactical consequence overshadowed by Antietam’s horrific carnage just three days later. In fact, the fight was a decisive Federal victory and important turning point in the campaign, as historian Brian Matthew Jordan argues convincingly in his fresh interpretation Unholy Sabbath: The Battle of South Mountain in History and Memory, September 14, 1862.Most writers brush past the mid-September battle in a few paragraphs or a single chapter. Jordan, however, presents a vigorous full-length study based upon extensive archival research, newspaper accounts, regimental histories, official records, postwar reunion materials, public addresses, letters, and diaries. Readers will not only come away with a full understanding of the military actions at Fox’s, Turner’s, and Crampton’s gaps, but a deeper and more meaningful appreciation for the ways in which Civil War veterans and the public at large remembered military events—and why some were forgotten. The Union victory on the wooded and rocky slopes provided a substantial boost for the downtrodden men of the Union army, who recognized the battle as hard fought and deservedly won—a ferocious hours-long fight with instances of hand-to-hand combat and thousands of casualties. Jordan demonstrates conclusively that South Mountain was the first major victory for the Army of the Potomac, and the first time its men held the field and were tasked with the responsibility of burying the dead.Unholy Sabbath proposes a new rubric for evaluating this important combat by examining not only the minute military aspects of the battle, but how soldiers remembered the fighting and why South Mountain faded from public memory. Former Confederates true to the Lost Cause, argues Jordan, downplayed the victory, emphasized how outnumbered they were, and argued that their defense of the passes “protected the concentration of General Lee’s army on the field of Sharpsburg.” Union veterans, however, remembered South Mountain as a full-scale engagement wholly distinct from Antietam, and one where they outfought and completely defeated their Rebel opponents and disrupted the entire Southern invasion. This richly detailed study, complete with outstanding maps, photographs, a complete order of battle with losses, and an in-depth interview with the author, is modern Civil War history at its finest.

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