I don't know if this is the same Samuel, but I do know my 5 gg, John
Nesbitt, born, Dec 1753, Ireland, and died 11 May 1841,
Dickson County, TN, had an
Uncle Samuel, mentioned on page 729 of
South Carolina Roster. It states:
Nisbett, Samuel
From 16 May to 27 August 1779, he served under Captain Andrew
Berry. In addition, he served as a lieutenant from 2 June to 14 Septmeber on foot fromm 15 February to 15 May 1780 under Captain John
Berry and Col. Roebuck. At sometime he was a captain in the militia under Col. Roebuck.
(Nisbett, Robert; S4617); A.S. 5480: X3234: X3661.
I found another source that this family of Nesbitts was from County Down, and I believe it was verified by DNA from present-day male
Nesbitt descendants.
You could check the source numbers from the DAR, and see if your Samuel shows up somewhere in there.
John's brother was Robert
Nesbitt, Jr., and it is the source that states his uncle was Samuel, under whom he had served.
Karen Alexander