δι' ἐρημίας πολεμίων πορευόμενος → he marched on without finding any enemy, his route lay through a country bare of enemies
dĕcŭma: ae, f., v. decimus.
(2) dĕcŭma, etc., v. decim-.
decuma decumae N F :: tenth part/tithe; (offering/tax/largesse); tax/right to collect 10%; 10th hour