Deploy (?), v. t. & i. [imp. & p. p. Deployed (?); p. pr. & vb. n. Deploying.] [F. déployer; pref. dé&unr_; = dés (L. dis) + ployer, equiv. to plier to fold, fr. L. plicare. See Ply, and cf. Display.] (Mil.) To open out; to unfold; to spread out (a body of troops) in such a way that they shall display a wider front and less depth; -- the reverse of ploy; as, to deploy a column of troops into line of battle.
[1913 Webster]

{ Deploy (?), Deployment (?), } n. (Mil.) The act of deploying; a spreading out of a body of men in order to extend their front. Wilhelm.
[1913 Webster]

Deployments . . . which cause the soldier to turn his back to the enemy are not suited to war. H. L. Scott.
[1913 Webster]