Works thrown up by an army in besieging or defending a fortress, or in strengthening its position.
“Earth-forts, and especially field works, will hereafter play an important part in wars.” —W.T. Sherman: Memoirs, vol.ii. chap. xxiv. p. 398.
Field of Blood Aceldama, the piece of land bought by the chief priests with the money which Judas threw down in the temple; so called because it was bought with blood-money. (Matt. xxvii. 5; Acts i. 19.)
The battle-field of Cannæ (B.C. 216) is so called because it was especially sanguinary.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894