the Union Cavalry and Chickamauga Campaign

The battle exploded on September 18 as Col. Minty and Col. Wilder held off a determined attack by Confederate infantry. The fighting along Chickamauga Creek included notable actions at Glass Mill and Cooper's Gap. Union cavalry dogged Wheeler's forces throughout Tennessee. The Union troopers fought under conditions so dusty they could hardly see, leading the infantry through the second costliest battle of the war.