What is Afforce The Assise?

Legal Definition
In old English practice. A method of securing a verdict, where the jury disagreed, by adding other jurors to the panel until twelve could be found who were unanimous in their opihion. Bract, fol. 185b, 292a; Fleta, lib. 4, c. 9, § 2; 2 Reeve, Hist. Eng. Law, 267.
-- Black's Law Dictionary