 and extended to Tennessee and accompanied Sherman's thrust through Georgia.Haupt also experimented with bridge demolition using torpedoes (inserted in holes drilled in trusses) and also discussed in a November 1862 report various methods of destroying locomotives (firing a cannon ball through the boiler was irreparable; locomotives with fireboxes drained then fired could be repaired).He also tested a lightweight 2-clamp "rail-twister" for use in raids behind enemy lines.