Echelon
Webster's Practical Dictionary- A Practical Dictionary of the Englih Language · 1884 · p. 134
esh'e-lon, n. {Mil.) The position of tary body in the form of steps, or with one more advanced than another.
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British Encyclopedia (1933)
French-English Dictionary of Military Terms (1918)
Everybody's Encyelopedia (1912)
Chamber's Twientieth Century Dictionary (1908)
Chandler's Encyclopedia (1898)
A Military Dictionary and Gazetteer (1881)
Zell's Condensed Dictionary (1879)
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