pronunciation omitted

"Provisions for organization of troops.

The troop of 500 people is "旅".
And ５旅 is "師". (the troop of 2500 people)
As the maximum unit further，５師 is "軍". (the troop of 12500 people)
We call them in this manner.　

Provisions for number of soldiers of the standing army.
　
Zhou their home country is 6軍. (75000 people)
Country of large-scale is 3軍. (37500 people)
Country of medium-sized is 2軍. (25000 people)
And small country is 1軍. (12500 people)"

This seems to have been military system of Zhou.

Note:By the way，translation of 軍 is "army".
　
陸軍(Army)
海軍(Navy)
旅団(Brigade).
師団(Division).

The scale is different，but these word is used in Japan as a military term modern.
　
陸(Land)
海(Sea)　
　
And 団 in this case，this is the abbreviation of 集団.
General meaning of 集団 is "group".


・・・・・・・・・
　

Another name of Zhou home country was "万乗之国".

"Country which hold the chariots of ten thousand."
　
This representation is not common in modern，but this word meant this.
(And this also meant the country of the king.)
　
Battle by chariots of tens of thousands which the aristocracy was riding.
War of China at the time seems to have been the main this is.
(Infantry seems to have been a presence auxiliary to the last.)
　
Well，around 300 years have passed from the founding of Zhou.
Kingship of Zhou had become titular since then.
And territory of the king of Zhou had been eroded by vassals.　

"For the king of Zhou."
But their's war at the time took place in this nominal.
　
"Vassal of justice to punish vassal of unrighteousness."
　
In short，it's nominal like this.　
　
Of course，this is just a nominal.
But this was supposed to one brake of the war expansion.
　
"Loyal subject of Justice who assist the king."

Because winner side had to worry about the nominal.
They were never to be a very terrible behavior against loser.
　　
Therefore，domestic war since the founding of the Zhou at least.　
It seems to was not a large scale so much.

Note:Charioteer and combat soldier.
A total 3-4 people seems to rode one chariots

Incidentally，appearance of cavalry in China.
It is after entering the Warring States period.