This is the title given to these two small books by J.L. Carr in his History of the Quince Tree Press (1987). In it he wrote:
Likely additions are The Great Civil War, The Wars of the Roses, and Lettered and Unlettered Freedom Fighters. They are not known to have been published.
Each small book is identified by an alphanumeric code: SBT for Small Book, Tracts, followed by three letters to identify the title and a number to identify the impression.