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How are army companies and regiments split up, how many people are in these sections, and how are they named?

• I've never known how many men are in certain military regiments. I don't even know what the difference between a regiment and a company is. What I want to know is: How many men are in a regiment, company, battalion, etc? What are the differences between them? and How are they named? (i.e. Why are they called the 1st Battalion, or Charlie Company?)

• Answer:

  There are 4 men in an Army Infnatry fire team. there are 2 fire teams and a squad leader in an infantry squad. there are 3 to 4 squads, a platoon sergeant, and a platoon leader, and usually a medic (who is attached feom the battallion) and a couple of RTOs in an infantry platoon. There are three platoons, a mortars section (7 to 9 men) and sometimes other weapons sections, a company admin NCO, a first sergeant, an executive officer, and a commander in a company (equivalent to a cavalry or or armor troop). A battallion (equivalent to a cavalry or armor squadron) has 3 or more companies. The mechanized units are bigger). A regiment has two or more Battallions, and a command and support staff. A brigade has a regiment and several other support companies, troops, battallions, squadrons of varoius kinds. A division has two or more brigades or regiments.