General David Stanley’s Union cavalry at Stones River in Middle Tennessee. The campaign saw some of the most desperately fought mounted engagements in the Civil War’s Western Theater and marked the end of the Southern cavalry’s dominance in Tennessee. This history describes the events leading up to the battle and the key actions, including the December 31 attack on Wheeler’s cavalry, the repulse of General John Wharton by the 1st Michigan Engineers and Wheeler’s daring raid on the rear of Williams Rosecrans’ army. Amid the chaos of the fighting, a Union cavalry regiment mutinied but a third of its men defied their comrades and charged into battle.