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Hannibal Day
Birth: Feb. 15, 1804
Washington County
Vermont, USA
Death: Mar. 26, 1891
Morris County
New Jersey, USA

Civil War Union Brevet Brigadier General. After graduating from the United States Military Academy in 1823 (with future Union Generals Lorenzo Thomas and George S. Greene), he was posted to the 2nd United States Infantry, a unit that he would be associated with nearly his entire career. His military service in the long years before the Civil War exhibited the typical stations of a career soldier, serving garrison posted on the Great Lakes, on the East Coast and in the Western Frontier. He directed portions of his unit in the 1832 Black Hawk War (where he saw no action) in the Florida Seminole wars of 1839 and 1842, and during the Mexican War. His rate of promoted also was typically slow for a career soldier in peacetime – he was not advanced to Captain until 1838, fifteen years after his graduation as a 2nd Lieutenant. He was advanced to Major in 1852, and to Lieutenant Colonel of the 2nd Infantry in February 1861. Less than a year later he was promoted to full Colonel of the 6th United States Infantry in January 1862 (which was necessitated by the expansion of the Army after the outbreak of hostilities with the South). As one of the oldest officers in the Army, he was relegated to desk and recruitment posts, far from the field of action. However, events of June and July 1863 thrust him into his single combat command of the war, and his first combat field command since the Mexican War. When Army of the Potomac commander Major General Joseph Hooker resigned as its head in late June 1863, V Corps commander Major General George G. Meade was detailed to replace him, and his spot was filed by Major General George Sykes. Sykes’ First Division was then taken over by Brigadier General Romeyn B. Ayers, and Colonel Hannibal Day was assigned to lead Ayers old First Brigade, made up of Regular Army troops. Having led the brigade for only three days, and being wholly unfamiliar with his officers and men, Colonel Day was positioned on the Federal Left flank on the Second day of the Battle of Gettysburg (July 2, 1863). When Brigadier General John S. Caldwell’s Division was thrown into the maelstrom of the Wheatfield, Colonel Day’s brigade was sent in support, and ended up at the eastern edge of the Rose Woods. His horse was killed in the action there, and his men, while lying prone, were flanked when Confederate forces pushed back the brigade in his right. He led the Regulars in an orderly retreat, but sustained 382 casualties during his relatively brief time on the field. After regrouping near Little Round Top, the brigade saw no more action. Less than a month later (August 1) Colonel Day retired "on his own application after forty consecutive years of service”. He spent the next year on volunteer court martial duty. On March 13, 1864 he received a brevet of Brigadier General, US Regular Army for “long and faithful services in the Army”. He passed away in Morristown, New Jersey in 1891. (bio by: Russ) 
Family links: 
  Sylvester Day (1778 - 1851)
  Maria Ann Houghton Day (1808 - 1891)*
  Sylvester Henry Day (1840 - 1926)*
  Russell Hamilton Day (1845 - 1882)*
  Lavinia Day Hoff (1847 - 1933)*
  Lavina Day Newcomb (1802 - 1835)*
  Hannibal Day (1804 - 1891)
*Calculated relationship
Evergreen Cemetery
Worcester County
Massachusetts, USA
Plot: Section 1, Lot 219
Maintained by: Find A Grave
Originally Created by: Russ
Record added: Nov 11, 2003
Find A Grave Memorial# 8076951
Hannibal Day
Added by: Ryan Sandy
Hannibal Day
Added by: Russ
Hannibal Day
Added by: Russ
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- Roses♥~
 Added: Jul. 4, 2017

- Roses♥~
 Added: May. 26, 2017
Thank you sir for your service to our country during our American Civil War. Rest in peace.
- Daniel Moran
 Added: Feb. 15, 2016
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