1. jackson, thomas jonathan known as Stonewall Jackson, an American general, born in Virginia; bred for the army; distinguished himself in the Mexican War; retired from the army in 1853, and became a professor in Mathematics and MilitaryScience in Virginia; was appointed brigadier-general in the Confederatearmy at the outbreak of the Civil War, and earned the nom de guerre of "Stonewall" by his firmness at the battle of Bull Run, July 21, 1861; distinguished himself in subsequent engagements; at Chancellorville was by mistake fired at in the dark and mortally wounded by his own men on May 6, 1863; he was a man of the Cromwell stamp, and his death was not only a blow to his own party, but matter of grief to the wholeAmericannation (1824-1863).