Asa Eggleson, Jr. (also spelled Eggleston, Eagleston, Eglestone, and other variants) was born on 19 February 1763 in Voluntown, New London County, Connecticut, the son of Asa, Sr., and Martha (Button) Eggleson. The father, Asa Eggleson, Sr., has also been recognized as a Revolutionary War Patriot. More information regarding the Eggleson family can be found in the book: Hall-Eggleson Genealogy, Volume 1: Asa William Eggleson and His Family, and in Hall-Eggleson Genealogy, Volume 2: The Descendants of Asa William Eggleson, by Timothy E. Peterman.

The Eggleson family owned a large tract of land on the state line between Connecticut and Rhode Island and the county line between Windham County, Connecticut, and New London County, Connecticut. Records for the Eggleson family can be found in Hopkinton, Rhode Island, Voluntown, Connecticut, and Stonington, Connecticut.

Shortly after the Revolutionary War, the Eggleson family participated in the extensive migration of New Englanders to the upper part of New York. Although Asa Eggleson, Sr. moved to Pittsfield, Berkshire County, Massachusetts, before 1785, Asa Eggleson, Jr. moved to Oswego, Dutchess County, New York, at about the same time. Asa Eggleson, Jr. never owned land there. His brief presence was only documented in a deposition that his future brother-in-law, Joseph Hadsell, made in 1847 in Jefferson County, New York:

"On 14 September 1847, appeared before me Joseph Hadsell, and he affirmed that on 27 March 1786, his sister Content Hadsall was married to Asa Eggleston (a revolutionary war pensioner) in the town of Oswego and county of Dutchess and state of New York and the deponent was present at the time and saw the ceremony performed and further the deponent saith not."

By the late 1780s, both Asa Eggleson, Sr., and Asa Eggleson, Jr., were living in Washington County, New York. In the winter of 1817-1718, Asa Eggleson, Jr. moved with his family to Champion, Jefferson County, New York. In about 1822, they moved to Antwerp, Jefferson County, New York. 

Asa, Jr.'s Revolutionary War service has always been described as "Private in Captain Burdick's Co. in Colonel Dyer's Rhode Island Regiment; minuteman." His application for a Revolutionary War pension was dated 11 September 1832 (pension application W22994). The file contains a lot more detail:

At Voluntown, Connecticut, in 1778 -he volunteered under Capt. Burdick Col. Dyer's Regiment -Gen'l Moxon'sMoxon's Brigade Connecticut or Rhode Island State Troops for nine months -marched into Rhode Island was under the command of Genl Sullivan was commanding -The French Fleet arrived at Rhode Island while I was there -cannot recollect when I enlisted ____ -recollect I was discharged late in the Fall -was in my 15th year-

The same year my Father Asa Eggleson was drafted, I went as a substitute for him in Capt. Burdick's Compy Col. Dyer's Regt. -Rhode Island Troops -marched to a place called Obdikes___ Town, Rhode Island -was drafted for one month and served a few days longer than that time.
1779. In June, I entered a minute man for during the war in Capt. Burdicks Company, Col Dyers Regt Rhode Island State Troops kept constantly equipped and provided with three days provision -was soon after called out to Little Rust and Tower Hill, where I lived about 25 days.
Soon after was ordered out -went to Stonington Point, and was in the Town for about a fortnight.

Soon after was called out again to go to Long Island -but did not go further than the water side -the expedition given up -was out about one week.

The next was an Expedition to Groton Fort -at the time Groton Fort was taken -got there next _________ and helped bury the Dead -was out about 20 days, returned and stood a minute man to the End of the War -have no evidence but that of Elipha Hadsell which is hereto attached -was born in Voluntown Con Feby 19 1763 age recorded and ______ in Court

Lived since the Rev War. have lived in Stonington -Greenwich, Washington Co NY -Hebron in the same co. Antwerp where I now live -never had a written discharge -has no documentary evidence.

In about 1822, Asa Eggleson, Jr., and family moved to Antwerp, Jefferson Co., NY. 

• Asa, Jr., and Content (Hadsell) Eggleson had eleven known children:
• Cynthia was born on 19 March 1787 and married  Joel Munson. 
• Asa, III was born on 15 August 1789 and married Patience Rogers.
• Mary was born on 21 August 1791 and married John Rogers.
• Perry was born on 16 August 1793 and married Sally Colburn.
• Rachel was born on 12 January 1796.
• Dorcas was born on 28 October 1798 and married Nathaniel T. Munson.
• Samuel R. was born on 27 April 1801 and married Mary Thurston.
• Martha was born on 7 April 1803 and married David Dewey.
• John Mitchell was born on 7 August 1806 and married 1) Anne Keene and 2) Luana (Seaver) Clark.
• David Hadsell was born on 17 September 1808 and married 1) Mary Ann Hart and 2) Elizabeth Rugg.
• Harriet M. was born on 12 March 1814 and married Richmond Howland, Jr.

Asa Eggleson Jr. died on 10 August 1840 in Antwerp, Jefferson County, NY. Content (Hadsell) Eggleson died on 13 April 1850 in Antwerp, Jefferson County, NY. No probate records have been found. However, their youngest daughter, Harriett (Eggleson) Howland, died intestate in 1896, a widow with no children. Her probate records contain a document called Schedule A, which listed the names and residences of all descendants of Asa and Content (Hadsell) Eggleson, who were living in 1896.