This book is a historical analysis of the effectiveness of Union Cavalry during the Chickamauga campaign. General William S. Rosecrans' desire to develop Union--cavalry in the Army of the Cumberland into an effective counter to Confederate cavalry is compared to the results achieved during the Chickamauga campaign. The Chickamauga campaign was the first major test of the consolidated Cavalry Corps in the Army of the Cumberland. The contribution of the cavalry failed to meet expectation in developing intelligence on General Braxton Bragg's Army of Tennessee and in influencing the outcome of the two day battle. This study attempts to answer the question "How could the Union Cavalry have been better utilized during the campaign?" This book concludes that the improvements in the Union cavalry in terms of arms and equipment were not matched by development of senior cavalry leaders that had a clear vision of how to employ the instruments of their own making, a consolidated cavalry Corps.