World History Maps Interactive Historical Atlas of the Civil War, detail page for:

Northern, US Army Department Jan 12, 1864 - after Jun 25, 1865

US Northern Dept. created Michigan Ohio Indiana and Illinois transferred from Dept. of the Ohio, Jan 12, 1864
Cairo Illinois transferred from US Dept. of The Tennessee to Northern Dept., Jan 12, 1864
Samuel P. Heintzelman Commander, Jan 12, 1864 - Sep 28, 1864
Cairo Illinois transferred from US Northern Dept. to Dept. of The Tennessee, Feb 8, 1864
Joseph Hooker Commander, Sep 28, 1864 - after Jun 25, 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