This thesis compares and contrasts the field artillery corps of the Army of Northern Virginia and the Army of Tennessee. The purpose is to determine which field artillery corps was more effective on the battlefield and why. To answer this question several areas will be examined. The foundation of each army and its field artillery corps is one of these areas. The foundation includes militia forces, strength, recruiting, and governmental roles in the foundation of each army. The senior leadership of each army and its relationship with the Confederate government will be reviewed. Ordnance, equipment, logistics, and training of each army's field artillery corps are other areas that will be addressed. Finally, artillery leadership, organization, and tactics of each field artillery corps will be examined.