I don't think anybody knows the size of a division...
Here's the dictionary definitions:
Division: 9. (Military.) (a) Two or more brigades under the command of a general officer. (b) Two companies of infantry maneuvering as one subdivision of a battalion. (c) One of the larger districts into which a country is divided for administering military affairs.
Brigade: a. A military unit consisting of a variable number of combat battalions or regiments.
Battalion: An army unit typically consisting of a headquarters and two or more companies, batteries, or similar subunits. A large body of organized troops.
Regiment: A military unit of ground troops consisting of at least two battalions, usually commanded by a colonel. A large group of people.
Company: A subdivision of a military regiment or battalion that constitutes the lowest administrative unit. It is usually under the command of a captain and is made up of at least two platoons.
Battery: 3. (Mil.) (a) Any place where cannon or mortars are mounted, for attack or defense. (b) Two or more pieces of artillery in the field. (c) A company or division of artillery, including the gunners, guns, horses, and all equipments. In the United States, a battery of flying artillery consists usually of six guns.
Troops: a. A group of soldiers. b. troops Military units; soldiers. c. A unit of cavalry, armored vehicles, or artillery in a European army, corresponding to a platoon in the U.S. Army.
Platoon: A subdivision of a company of troops consisting of two or more squads or sections and usually commanded by a lieutenant.
Squad: The smallest tactical unit of military personnel.
etc., etc., etc |