CEASELESS VIOLENCE AND  BRUTALITY:  5/8: The Unvanquished: The Untold Story of Lincoln’s Special Forces, the Manhunt for Mosby’s Rangers, and theShadow War That Forged America’s Special Operations Hardcover – by  Patrick K. O'Donnell  (Author)

https://www.amazon.com/Unvanquished-Lincolns-Special-Americas-Operations/dp/080216286X

At the heart of this groundbreaking narrative is the epic story of Lincoln’s special forces, the Jessie Scouts, told in its entirety for the first time. In a contest fought between irregular units, the Scouts hunted John Singleton Mosby’s Confederate Rangers from the middle of 1863 up to war’s end at Appomattox. With both sides employing pioneering tradecraft, they engaged in dozens of raids and spy missions, often perilously wearing the other’s uniform, risking penalty of death if captured. Clashing violently on horseback, theunconventional units attacked critical supply lines, often capturing or killing high-value targets. North and South deployed special operations that could have changed the war’s direction in 1864, and crucially during the Appomattox Campaign, Jessie Scouts led the Union Army to a final victory. They later engaged in a history-altering proxy war against France in Mexico, earning seven Medals of Honor; many Scouts mysteriously disappeared during that conflict, taking their stories to their graves.
1863 GETTYSBURG