Confederate engineers who made their mark.When it is realized that few of the officers in the Corps of Engineers March 16, 1861. He Confederate Engineers Corps had any previous was made colonel the following year, and practice as military engineers, although some brigadier-general August 28, 1864. He was of them had been educated at military academies, and that no engineer troops were provided for by the Confederate Congress until 1863, the work accomplished by the Confederate engineers seems all the more marvelous. The Confederate coastwise defense were strengthened in a way that baffled the blockading fleet, and no two armies have ever been entrenched in the field as were the armies of the South and North before Petersburg. Walter H. Stevens became major in the Confederate chief engineer of the Army of Northern Virginia before Petersburg, and surrendered at Apponmattox. Danville Leadbetter also became a major in the Engineer Corps March 16, 1861. He was a brigadier-general of the Provisional Army of the Confederate States February 27, 1861. J. F. Gilmer was lieutenant-colonel of the Engineer Corps in 1861. He became brigadier-general in the Confederate army in 1862, and major-general in 1863. During most of his service he was chief of the engineer bureau.