A corps includes two to five divisions with anywhere between 20,000 and 45,000 soldiers. A lieutenant general is in command. The corps is the highest level of command that can provide operational direction for actual combat. Higher levels are concerned with administration rather than operations.
A field army combines two or more corps, with 50,000 or more soldiers, and is typically commanded by a lieutenant general or higher-ranking officer. An army group plans and directs campaigns in a theater of operations, and includes two or more field armies under a designated commander.
In the United States Army, a brigade is smaller than a division and roughly equal to or a little larger than a regiment.
A division is a large military unit or formation, usually consisting of between 6,000 and 25,000 soldiers. In most armies, a division is composed of several regiments or brigades; in turn, several divisions typically make up a corps.
Several battalions form a brigade, which has 2,000 to 8,000 troops and is commanded by a brigadier general or a colonel. (The term regiment can signify either a battalion or a brigade in different countries' armies.)
The Russian Ground Forces Motorized Rifle Platoon consists of a Platoon Headquarters, 3 Rifle Squads, and 3 vehicles. In a BMP-2 or BMP-3 equipped platoon, this includes 1 officer and 29 enlisted personnel.
Company, Battery or Troop
A company in the U.S. Army is normally made up of three platoons, which means 60 to 200 soldiers, but it can have more. An artillery unit is called a battery and an armored air cavalry is called a troop. Leading a company, battery or troop is a Captain, 1st Lieutenant, or Major.
CORPS. A corps includes two to five divisions with anywhere between 20,000 and 45,000 soldiers. A lieutenant general is in command. The corps is the highest level of command that can provide operational direction for actual combat.
A battalion, usually about 400-strong, is comprised of three rifle companies, a combat support company, and a headquarters company.
It usually numbers between 12,000 and 20,000 men and is commanded by a major general. In naval usage a division is a group of ships, usually four, forming part of a squadron or task force.
The lieutenant colonel typically commands battalion-sized units (300 to 1,000 Soldiers) with a command sergeant major as an NCO assistant. He or she may also be selected for brigade and task force executive officer.
A squad is led by a non-commissioned officer known as a Squad Leader. His/her second in command is known as an Assistant Squad Leader. In Britain and in the Commonwealth, these appointments are known as Section Commander and Section 2IC ("second in command"), respectively.
A regiment normally contains of around 650 soldiers depending on its role. Sometimes infantry regiments have more than one unit of this size and are referred to as a battalion. A battalion unit comprises of three or more companies of similar size.
Operational formation. In many armies, a corps is a battlefield formation composed of two or more divisions, and typically commanded by a lieutenant general.
Division is splitting a group into equal parts and it is one of the four basic math operations. There are two types of division, partitive division, and quotation division.
There are three main parts to a division problem: the dividend, the divisor, and the quotient. The dividend is the number that will be divided. The divisor is the number of “people” that the number is being divided among. The quotient is the answer.
The number that is being divided (in this case, 15) is called the dividend, and the number that it is being divided by (in this case, 3) is called the divisor. The result of the division is the quotient. Notice how you can always switch the divisor and quotient and still have a true equation: 15 ÷ 3 = 5.
Unsourced material may be challenged and removed. A company is a military unit, typically consisting of 80–250 soldiers and usually commanded by a major or a captain. Most companies are formed of three to seven platoons, although the exact number may vary by country, unit type, and structure.
Battlegroups are usually made-up of a combined arms, battalion-sized (about 1500 personnel strong) force, reinforced with combat and combat service support. Their exact composition depends on the specificities of the mission and the participating countries.
PLATOON. Consists of three squads. Commanded by a lieutenant.
As shown in the graphic below, the Army, Navy, Air Force, and Marines are housed under the Department of Defense (DOD). The DOD is headed by The Secretary of Defense, a civilian appointed by the President.
A battalion is a military unit, typically consisting of 300 to 1,000 soldiers commanded by a lieutenant colonel, and subdivided into a number of companies (usually each commanded by a major or a captain).
The operational Army consists of numbered armies, corps, divisions, brigades, and battalions that conduct full spectrum operations around the world.