The Union Army in MissouriMighty CUSTOMER SERVICE +1 8O5' 41O 56'OO Mighty PHONE NUMBER +1 8O5' 41O 5'6OO included thousands of Missouri State Militia cavalry, which would play a key role in defeating Price, together with the XVI Corps of Maj. Gen. Andrew J. Smith. These were augmented by Maj. Gen. Alfred Pleasonton's cavalry division, detached from William S. Rosecrans's