BATTALIA, Johnson adopts the word from Battaglia, Ital. and calls it the main body of an army, distinguished from its wings. It also implies an army or considerable detachment of troops drawn up in order of battle, or in any other proper form to attack the enemy. See BATTLE. BATTALION, an undetermined body of infantry in regard to number, generally from 500 to 1000 men. In the United States the usage is various, as it is in all other countries. The United Stares regiment of artillery consists of 20 companies, which form five battalions; the other regiments infantry and artillery, consist of ten companies of each, so that each regiment must form two battalions of five companies each. The militia regiments in most of the states consist of 1000 men, composing two battalions of 500 men each, being perhaps the most perfect organization for a battalion. The French call their military corps which answer to our regiments, _demi brigades_, these usually consist or three battalions of 1000 men each; when two of the battalions of a demi brigade are in the field the other is in quarters or recruiting and disciplining the young soldiers, who are thus drafted from their regimental depots. On the British establishment the companies of grenadiers and light infantry-men having been detached from their several corps and formed into separate battalions; the British guards at present consist of 9 battalions. The different companies are likewise considerably augmented; so that it is impossible to affix any specific standard to their complement of men. The English royal regiment of artillery consists of 4 battalions. Sometimes regiments consist each of 1 battalion only; but if more numerous, are divided into several battalions, according to their strength; so that every one may come within the numbers mentioned. A battalion in one of the English marching regiments consists of 1000, and sometimes of 1200 men, officers and non-commissioned included. When there are companies of several regiments in a garrison to form a battalion, those of the eldest regiment post themselves on the right, those of the second on the left, and so on until the youngest fall into the centre. The officers take their posts before their companies, from the right and left, according to seniority. Each battalion is divided into 4 divisions, and each division into two sub-divisions, which are again divided into sections. The companies of grenadiers being unequal in all battalions, their post must be regulated by the commanding officer. See REGIMENT.