The establishment level of the army is divided into army, division, brigade, regiment, battalion, company, platoon and squad, among which regiment is the basic tactical unit and belongs to the smallest unit that can integrate all arms in the traditional army establishment.

The regiment is a military-level organization composed of several battalions (or companies) and combat and service support units. Usually subordinate to a division (or brigade), it is a basic tactical unit, which usually performs combat tasks within the division (or brigade) or can fight independently. A standard group is 1500 people, so a brigade is about 5000 people.

Structure of the brigade:

The specific structure and scale of the brigade are also different. In most countries, the army's brigade implements the brigade management battalion system, but the number of personnel varies. China People's Liberation Army consists of infantry brigade, armored (tank) brigade, artillery brigade, air defense brigade, marine brigade, missile brigade, radar brigade and anti-aircraft gun brigade.

US Army organic brigade, armored brigade, light brigade, aviation brigade, artillery brigade, air defense artillery brigade, engineering brigade, communication brigade, military intelligence brigade, gendarmerie brigade, independent brigade, etc. Russia has Mobu Brigade, Tank Brigade, Missile Brigade, Air Defense Missile Brigade, Airborne Brigade, Engineer Brigade and Marine Brigade.

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