Early in the Tullahoma Campaign, Union forces in the Army of the Cumberland advanced upon a series of gaps south of Murfreesboro occupied by the Confederate Army of the Tennessee. In a series of attacks and counter-attacks that followed including the 39th Indiana Infantry armed with Spencer repeating rifles, the Confederate forces withdrew to Tullahoma.
Murfreesboro First Battle
On July 13, 1862 Confederate cavalry of Brig. Gen. Nathan Bedford Forrest conducted a surprise attack on the Union garrison