1st Regiment, US Veteran Volunteer Engineers (Union)1st/3rd Battalions, Pioneer Brigade (Union)
"Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit. The Civil War Soldiers and Sailors System, (accessed 6 December 2010).</ref>.
Companies in this Regiment with the Counties of Origin
Men often enlisted in a company recruited in the counties where they lived though not always. After many battles, companies might be combined because so many men were killed or wounded. However if you are unsure which company your ancestor was in, try the company recruited in his county first.
National Park Service, The Civil War Soldiers and Sailors System, is searchable by a soldier's name and state. It gives a soldier's regiment and rank for soldiers on both sides of the Civil War. It also has lists of regiments by state, descriptions of significant battles, sources of the information, and suggestions for where to find additional information. (accessed 6 December 2010).