 During the reorganization after Grant took command in the city, the brigade was broken up and the regiments were transferred to the Cavalry Corps.The 17th and the 98th Illinois Mounted Infantry were assigned to 2nd Brigade under Colonel Eli Long of the 2nd Division of the Cavalry Corps under Major General George Crook.On 1 October, the 17th joined the rest of the Cavalry Corps operating against Wheeler's rebel cavalry, then in the Sequatchie Valley.