re: Civil War nicknames for SEC states..

Texas Most famous Civil War fighting force was Hood's Texas Brigade of the Army of North Virginia, a member of Longstreet's Corps.

It initially comprised the 1st, 4th, and 5th Texas regiments, the 18th Georgia Infantry, and Hampton's South Carolina Legion.

After the battle of Antietam in 1862, the Georgians and South Carolinians were reassigned to other brigades. Then The 3rd Arkansas Infantry was added due to their being the only other trans-Mississippi regiment and single Arkansas regiment serving with Lee's army.

The Texas Brigade, along with the Stonewall Brigade from Virginia, were considered to be the Army of Northern Virginia's shock troops.By the war's end, the Texas Brigade had fought in all the battles engaged in by the Army of Northern Virginia except Chancellorsville.

The brigade's most famous action took place on the second day of the Battle of Gettysburg, during its fight for Devil's Den. Though the Confederacy ultimately lost that battle, the 1st Texas, 4th Texas, 5th Texas, and 3rd Arkansas distinguished themselves in taking Devil's Den despite being greatly outnumbered and suffering heavy casualties.