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Mississippi, US Army Department Nov 28, 1864 - May 17, 1865

Cairo Illinois transferred from US Dept. of The Tennessee to Northern Dept. US Dept. of Mississippi created Dept. of the Tennessee discontinued and absorbed, Nov 28, 1864
US Dept. of Mississippi assigned to Division of WEST MISSISSIPPI, Nov 28, 1864
Napoleon J. T. Dana Commander, Nov 28, 1864 - May 1, 1865

Western Tennessee transferred from US Dept. of Mississippi to Dept. of the Cumberland, Feb 10, 1865
Geoverneur K. Warren Commander, May 1, 1865 - after Jun 25, 1865
Louisiana Mississippi Alabama and Florida transferred from US Depts. Of the Cumberland South and Mississippi to Dept. of The Gulf, May 17, 1865