In a general way it may here be interpolated that the organization of an army is given in the military manuals as follows:
INFANTRY.
A squad is 8 men under the command of a corporal.
A section is 16 men under the command of a sergeant.
A platoon is from 50 to 75 men under a lieutenant.
A company is 3 platoons, 200 to 250 men, under a captain.
A battalion is 4 or more companies under a major.
A regiment is 3 or more battalions under a colonel, or a lieutenant-colonel.
A brigade is 2 or 3 regiments under a brigadier-general.
A division is 2 or more brigades under a major-general.