The 7th Mississippi Infantry regiment also known as part of "The High Pressure Brigade" was organized at Corinth, Mississippi, in April 1861. Some of the states finest young men eagerly signed to fight with the unit. Amite, Covington, Franklin, Holmes, Lawrence, Marion, Pike, and Yalobusha counties all sent volunteers.|
The Regiments first dutys were on the gulf coast. By early 1862 the unit was a part of the great Army of Tennessee. December 1863 saw the unit being consolidated with the 9th Mississippi Infantry. This lasted from November 1863 to April 1865.
On april 9 1865 the unit was at Smithfield, N.C. It was then consolidated with the 9th, 10th, 41st, and 44th Inf. regiments. Also consolidated with the 9th inf. Battalion (sharpshooter) to become designated the 9th Mississippi Inf. The unit was in the Carolinas campaign until surrendered on April 26, 1865. Some elements of the 7th were surrendered in Alabama.