Cullum was an instructor of practical military engineering at West Point from 1848 to 1851. He then served as director of the Sappers, Miners and Pontoniers at West Point. Cullum published the forerunner of his Biographical Register in 1850.
Cullum was an instructor of practical military engineering at West Point from 1848 to 1851. He then became the director of the Sappers, Miners and Pontoniers at West Point. Cullum released a version that would later become the Biographical Register in 1850.