The following information was assembled from numerous sources and cannot be used directly as proof of Qualifying Service or Lineage.
It is considered a research aid and is intended to assist in locating sources that can be used as proof.
State of Service: NC
Qualifying Service: Patriotic Service / Soldier
Took Oath of Allegiance to make Land Entry, Mecklenburg County, 23 Jul 1778
David Allison was found listed as a Commissary in the Guilford County Regiment of Militia. In June of 1780, Major William Davies commanded a special unit of Light Horse, mostly with men from Guilford and Mecklenburg Counties of Salisbury District, including Commissary David Allison.  
Additional References:
SAR Patriot Index Edition III (CD: PP2210, Progeny Publ, 2002) plus data to 2004
NSDAR #718073 cites: North Carolina Rev War Pay Vouchers, @207, Roll #S115.65
North Carolina Rev Army Accounts, Vol X, pg 90, Folio 1, Roll #S115.57.4
North Carolina Land Grand Office Records, Mecklenburg County, #3077
Roster of Soldiers from North Carolina in the American Revolution, #6209 Salisburg District , North Carolina Militia, pg 316
The American Revolution in NC, The Independant Corps of Light Horse, Mecklenburg and Guilford Counties of Militia
North Carolina Archives, Rev War Pay Voucher, # 849. Salisbury District 14 Jul 1781, to pay Four hundred twenty six pounds, twelve shilling specie to David Allison of Salisbury District
A Find-a-Grave Search was negative as of August 2020
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