BATTALIA n. 2 definitions
Order of battle; disposition or arrangement of troops (brigades, regiments, battalions, etc.), or of a naval force, for action. A drawing up the armies in battalia. Jer. Taylor.
ENGINEER CORPS; CORPS OF ENGINEERS n.
Corps of Engineers, a corps of officers and enlisted men consisting of one band and three battalions of engineers commanded by a brigadier general, whose title is Chief of Engineers. It has charge of the construction of fortifications for land and seacoast defense, the improvement of rivers and harbors, the constructio…