The line of battle.
acies 1. Battle array, the front of an army line of battle; from Roman antiquity. 2. The keen attention or aim, of the eye, ear, etc. when fully directed towards any object.Found on http://www.wordinfo.info/words/index/info/view_unit/17/
Battle line.Found on http://www.encyclo.co.uk/local/20764
keenness, edge, sharpness, battle-line, battlefield.Found on https://www.math.ubc.ca/~cass/frivs/latin/latin-dict-full.html
Latin, meaning: keeness, edge, sharpness, battle-line, battlefield. Found on http://archives.nd.edu/aaa.htm
No exact match found