 One of the most well known was the Texas Brigade, made up of the 1st, 4th, and 5th Texas, and the 3rd Arkansas, which distinguished themselves in numerous battles, such as during their fight for the Devil's Den at the Battle of Gettysburg.The first commander of the Army of Northern Virginia was General P. G. T. Beauregard (under its previous name, the Confederate Army of the Potomac) from June 20 to July 20, 1861.His forces consisted of six brigades, with various militia and artillery from the former Department of Alexandria.