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Webster 1913 Edition

Noun.

[Gr. [GREEK] and [GREEK]; [GREEK] a division of an army, a brigade (from [GREEK] to arrange, array) + to rule.]

(Gr. Antiq.)

An Athenian military officer commanding a certain division of an army.

Milford.

Noun.

[Gr. order, and chief.] An Athenian military officer commanding a taxis or battalion.

taxiarch ‎(plural taxiarchs)

(historical, Ancient Greece) An Athenian military officer commanding a certain division of an army.
(Can we find and add a quotation of Milford to this entry?)
- 1968, James Grant Wilson, John Fiske, Appleton's Cyclopædia of American Biography
  In recognition of his services in the education of the women of Athens, he was buried with the honors of a taxiarch, by special orders […]