John C. Jennison

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John C. Jennison

Birthplace: Dover-Foxcroft, Piscataquis County, Maine, United States
Death: July 24, 1863 (40) (Civil War Casualty)
Place of Burial: Dover-Foxcroft, Piscataquis County, Maine, United States
Immediate Family:

Son of Ebenezer Jennison and Adeline Jennison
Husband of Lydia A. Jennison and Cordelea Jennison
Father of Elizabeth Chapin; Miriam E. Jennison; Elzada M. Jennison; Melvina E. Jennison; Francis E. Edgecomb and 4 others
Brother of (USA), William Holmes Jennison; Timothy Lindall Jennison; Betsey Margaret Washburn; Franklin Sewell Jennison; Charles Whipple Jennison and 3 others

Managed by: Private User
Last Updated:

About John C. Jennison

Civil War Veteren

Affiliation: Union

Rank: Sergt.

Co. : B

Regt.: 20th Maine Infantry

Died in service: July 24, 1863

Note: Middle initial differs. Fold3 records show middle initial as C.

The 20th Maine Inf. was mustered into service Aug. 29, 1862. Saw their first service at Antietam. At the battle of Gettysburg on Little Round Top they earned undying fame, their thin line withstood the attack of three lines of battle.

Phineas M. Jefferds, Capt. Co, B. Resigned 1863, Settled in Illinois where he died.

John S. Jennison, Sergt. Co. B. died in service July 24, 1863.

Cyrus G. Pratt, Sergt. Co, B. Disabled in 1863. Died in Foxcroft.

Job S. Bearce, Co. B. Wounded but completed service. Died in Foxcroft.

William C. Brown, Corp. Co. B. Served to completion of war.

Thomas Daggett, Co. B. Mustered out June 15, 1865. Died in Foxcroft. Was a prominent agriculturalist. Member of Me. Cattle Commission.

Benjamin R. Field, Co. B. Served term of enlistment.

Jared F. Millet, Co. B. Invalid Corps. Died in Foxcroft.

Hudson S. Oakes, Co. B. Discharged with Regt. Died in Foxcroft.

Alonzo Z. Parsons, Co. B. Killed in action May 6, 1863.

Randall H. Spaulding, Co. B. Served full term. Died in Foxcroft.

Andrew C. Derring, Sergt. Co. B. Re-enlisted. Discharged June 1865.

Wm. H. Jackson, Co. B. Recruit Oct. 2 1862, Disabled

Wm. H Jennison, Co. B. Disabled Mch. 1863. Re-e[n]listed and served as Sergt. Discharged June 1865, Co. K. 31st Me.

Danville B. Oakes, Co. B. Disabled Jan. 3, 1863, Died in Foxcroft.

Wm. Towne, Co. B. Disabled. Resided in Dover.


History of 20th Maine Infantry


The 20th Maine was organized in the state of Maine and mustered into Federal service on August 29, 1862, with Col. Adelbert Ames as its commander. It was assigned to the Army of the Potomac in the 3rd Brigade, 1st Division, V Corps, where it would remain until mustered out on July 16, 1865. At that time, the brigade also consisted of the 16th Michigan, the 12th, 17th, and 44th New York, 83rd Pennsylvania Volunteer Infantry regiments, and a Michigan company of sharpshooters.

Combat History

Prior to their notable actions at Gettysburg, the regiment was held in reserve at Antietam, was among those forced to remain overnight within sight of the Confederate lines at Fredericksburg, forcing the regiment's Lt. Col. Joshua Chamberlain to shield himself with a dead man. The unit was unable to participate in the Battle of Chancellorsville due to a quarantine prompted by a tainted smallpox vaccine that had been issued to the unit's soldiers.[1] On May 20, 1863, Colonel Ames was promoted and was succeeded as colonel of the regiment by Joshua Chamberlain,[2] who had been offered and declined leadership of the unit at the time it was formed.[3]

Gettysburg and Little Round Top

The most notable battle was the regiment's decisive role on July 2, 1863, in the Battle of Gettysburg, where it was stationed on Little Round Top at the extreme left of the Union line. When the regiment came under heavy attack from the Confederate 15th and 47th Alabama regiments (part of the division led by Maj. Gen. John Bell Hood), the 20th Maine ran low on ammunition after one and a half hours of continuous fighting; it responded to the sight of rebel infantry forming again for yet another push at them by charging downhill with fixed bayonets, surprising and scattering the Confederates, thus ending the attack on the hill. The 20th Maine and the adjacent 83rd Pennsylvania together captured many men from both Alabama regiments (including Lt. Col. Michael Bulger, commander of the 47th),[4] as well as several other men of the 4th Alabama and 4th and 5th Texas regiments of the same division. Had the 20th Maine retreated from the hill, the entire Union line would have been flanked, endangering other Union regiments in the vicinity

Later War

Later actions in which the regiment participated included Rappahannock Station, Mine Run, the Wilderness, Spotsylvania, Petersburg, Peeble's Farm, Quaker Road, White Oak Road, Five Forks, and Appomattox.


The 20th Maine marched from Appomattox, Virginia, on May 2, reaching Washington, D.C., on May 12, where the remaining original members were mustered out of service on June 4, 1865, with the remainder of the regiment leaving the service on July 16.

The 20th Maine had a total wartime enrollment of 1,621 men (including initial muster, replacements, and drafts), losing 147 dead from combat, 146 dead from disease, 381 wounded, and 15 in Confederate prisons.

Cultural References

Their downhill charge is depicted in the novels The Killer Angels and Courage on Little Round Top, and was subsequently an important scene in the movie Gettysburg.

The 20th regiment was the subject of "Ballad of the 20th of Maine", a song by the Maine band Ghost of Paul Revere.

Engagements/ American Civil War


  • Antietam
  • Fredericksburg
  • Gettysburg
  • Spotsylvania Court House
  • Petersburg
  • Five Forks
  • Appomattox


Compiled by D. Glenn/2016

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John C. Jennison's Timeline

September 7, 1822
Dover-Foxcroft, Piscataquis County, Maine, United States
May 15, 1845
Dover-Foxcroft, Piscataquis County, Maine, United States
July 21, 1845
November 30, 1847
Dover-Foxcroft, Piscataquis County, Maine, United States
May 27, 1849
Dover-Foxcroft, Piscataquis County, Maine, United States
September 28, 1855
Dover-Foxcroft, Piscataquis County, Maine, United States
February 17, 1857
Dover-Foxcroft, Piscataquis County, Maine, United States
June 27, 1859
Dover-Foxcroft, Piscataquis County, Maine, United States
February 27, 1862
Dover-Foxcroft, Piscataquis County, Maine, United States