The Collaborative International Dictionary of English v.0.48:

Sally \Sal"ly\ (s[a^]l"l[y^]), v. i. [imp. & p. p. Sallied
   (-l[i^]d); p. pr. & vb. n. Sallying.] [F. saillir, fr. L.
   salire to leap, spring, akin to Gr. "a`llesqai; cf. Skr.
   s[.r] to go, to flow. Cf. Salient, Assail, Assault,
   Exult, Insult, Saltation, Saltire.]
   To leap or rush out; to burst forth; to issue suddenly; as a
   body of troops from a fortified place to attack besiegers; to
   make a sally.
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         They break the truce, and sally out by night. --Dryden.
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         The foe retires, -- she heads the sallying host.
                                                  --Byron.
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