The Collaborative International Dictionary of English v.0.48:

Embattle \Em*bat"tle\, v. t. [imp. & p. p. Embattled; p. pr. &
   vb. n. Embattling.] [OF. embataillier; pref. em- (L. in) +
   F. bataille battle. See Battle, and cf. Battlement.]
   To arrange in order of battle; to array for battle; also, to
   prepare or arm for battle; to equip as for battle.
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         One in bright arms embattled full strong. --Spenser.
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         Here once the embattled farmers stood
         And fired the shot heard round the world. --Emerson.
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