From the Dryden translation of Plutarch's Life of Sulla (aka Sylla).

Now that both armies were posted near each other, Archelaus lay still, but Sylla employed himself in cutting ditches from either side; that if possible, by driving the enemies from the firm and open champain, he might force them into the fens.

http://ancienthistory.about.com/library/bl/bl_text_plutarch_sylla.htm

My print edition has champaign rather than champain.

Bingley

Bingley