Union control of the Mississippi River begins…
April 1862 CE
Union control of the Mississippi River begins to tighten.
On April 7, while the Confederates were retreating from Shiloh, Union Major General John Pope defeats Beauregard's isolated force at Island Number 10, opening the river almost as far south as Memphis.
The Union ironclad Carondelet had passed the Island No. 10 batteries on the night of April 4 and anchors off New Madrid.
Pittsburg had followed on the night of April 6.
The ironclads help to overawe the Confederate batteries and guns, enabling Pope's men to cross the river and block the Confederate escape route.
Brigadier General William W. Mackall, who replaces McCown, surrenders Island No. 10 on April 8.
The Mississippi is now open down to Fort Pillow, Tennessee.