Adam Overacker was born on 27 June 1761 in Schaghticoke, Albany County, New York, the son of Michael and Anna Barbara Stober/Stover Overacker. His father was a member of the Schaghticoke Committee of Correspondence. 

Throughout the Revolution, Adam served in the New York Militia in Captain Henry Van der Hoff's Company. In the fall of 1777, he served during the Saratoga Campaign. He participated in the Battles of Stillwater and Saratoga, during which General Gates' continental forces engaged and defeated General Burgoyne. Subsequently, he enlisted for one year's active service in the late summer/early fall of 1778 in Captain Joseph Peck's Company, Colonel Christopher Yates Regiment (Albany County, Militia 14th Regiment). During his year of service, Adam was sent to Stillwater, New York, and assigned to Lieutenant Luke Brown's detail stationed at Fort Edwards near Saratoga. They were tasked with cutting and rafting timber for the construction of barracks. Upon discharge, he returned to his militia company. His militia company was mobilized every summer for a period throughout the war. He served in two campaigns near Palmerstown on the frontier under the command of Major Van Vacton. He also served at Fort Edwards under Colonel Warner when with the continental service and under Colonel Henry as a militiaman. 

Before the end of the war, Adam married Cornelia Van der Cook on 1 May 1781 at the Schaghticoke Dutch Reformed Church. She was born on 9 July 1761. Among their many children were:

• Barbara Ann was born in 1782
• Michael was born in 1785 
• Martinus was born in 1787
• Eva was born in 1790
• Catherine was born in 1796
• Sarah was born in 1800
• Esther was born in circa 1802
• Anthony Michael was born in about 1805

Cornelia died around 1810 in either Western New York or Cuyahoga County, Ohio. Adam married his second wife, Mrs. Chloe Canfield Burke, widow of Joseph Burke, in 1826 in Cuyahoga County. They had been married for about seven years when she died in southeastern Michigan. He then married Patience Harrington Adams, another widow, for the third time on 27 July 1833 in LaSalle Township, Monroe County, Michigan. 

While a resident of Saline, Michigan, Adam, at the age of 71 years, filed for his pension on 5 November 1832, as provided for in the Pension Act of 7 June 1832. He claimed he served at least three years in total. His certificate was approved and issued on 9 August 1833, granting him $80 annually. 

The Patriot died on 14 November 1842 and shared a significant granite marker in the East Grass Lake Cemetery with his daughter, Catherine, and her husband, Henry A. Francisco. Henry's mother, Hester Van der Cook, was the sister of Catherine's mother, Cornelia. On 16 April 1853, at the age of 79 years, Patience sought a widow's pension. On 28 September 1855, she sought, as a Revolutionary War widow, 160 acres of bounty land as provided for in the Bounty Land Act of 3 March 1855. She received both the land and a pension. Patience lived the rest of her life with a son, Samuel Adams, and died on 29 August 1872 at 98.

Sources: 

1. Adam Overacker / Overocker (Pvt., Cpt Pecks's Co., Col Yates' Rgt., New York Line, American Revolution), pension no. W. 2399, Case Files of Pension and Bounty-Land; Warrant Applications Based on Revolutionary War Service, compiled ca. 1800 - ca. 1912, documenting the period ca. 1775 - ca. 1900; Record Group 15; National Archives, Washington, D.C.