A battery is 130 to 180 men, with 4 to 8 guns, under a captain.
A group or battalion is 3 or 4 batteries under a major.
A regiment is 3 or 4 groups (battalions) under a colonel.
When regiments are combined into brigades, brigades into divisions, and divisions into army corps, cavalry, artillery, and certain other auxiliary troops, such as engineers, signal corps, aeroplane corps, etc., are joined with them in such proportions as has been found necessary. Every unit, from the company up, has its own supply and ammunition wagons, field hospitals, etc.
THE UNITED STATES ARMY.
Prior to 1915 the regular United States army was a mere police body as compared with the armed forces of other countries. It was concededly highly efficient, but for the purpose of entering into conflict with such forces as those presented by Germany, France and some of the other European countries it was admittedly inadequate.
The entire force consisted of 5,004 officers and 92,658 men. The forces were divided into 15 regiments of cavalry and 765 officers and 14,148 men; 6 regiments of field artillery, with 252 officers and 5,513 men; the coast artillery with 715 officers and 19,019 men, and 30 regiments of infantry, with 1,530 officers and 35,008 men. The Philippine scouts had 182 officers and 5,733 men; the Military Academy 7 officers and 6,266 men and the Porto Rico regiment of infantry with 32 officers and 591 men.
The signal corps had 106 officers and 1,472 men, and the engineer corps 237 officers and 1,942 men. There were also about 6000 recruits in the various branches of the service under training.
The marine corps, under the direction of the Secretary of the Navy, had 346 officers and 9,921 enlisted men.