Division is a corps-level organization composed of several regiments (or brigades). There are leadership and command organs, combat and service support troops and detachments. Usually belongs to a group army or army.

A brigade is a corps-level organization composed of several battalions (or regiments). Usually belongs to a division or a group army (army). Serve the tactical forces. There is a leading organ and a combat and service support unit.

2. Different numbers of people

5000-7000 divisions and 3000-5000 brigades.

3. Different grades

The rank of division commander is Major General and Senior Colonel. The rank is deputy division-deputy army. The rank of brigade commander is Colonel-Senior Colonel, and the rank is Deputy Division-Principal Division.

The army is a fighting collective composed of soldiers. If it is organized into a unit, it is easy to command, mobilize and calculate troops. The establishment of the army is the way the army organizes soldiers.

With the emergence and development of the army, the military establishment has experienced a development process from simple to complex, from low to high. The military establishment of different countries is different from that of the same country at different historical stages.