When marching in ancient times, which three armies did the three armies refer to?

We often hear such statements, such as "ordering the three services", "obeying the three services" and "rewarding the three services". What exactly does this "three services" mean? Why not say "Second Army" and "Fourth Army"?

In the troubled times of ancient times, there were many armies, so it was impossible to have only three armies. The famous ones are Xie Xuanbei's army, Datang's border guards, Gaoshun's camp and Judy Ji Shen's camp. The trumpets in different dynasties are different, and the number of troops far exceeds three.

Why did the commander-in-chief always give orders to the "three services" before the war? When did the term "three services" come into being?

We all know that "three" is an imaginary number in ancient times. Like "hundred" and "ten thousand", it can sometimes be used to refer to more, so the three armed forces used to refer to a large number of troops. In ancient times, there were three armies: infantry, chariots and cavalry, so they originally referred to these three armies.

The earliest record of the "three armies" was the Zhou Dynasty, but it was not necessary to collectively refer to the army at that time. The "army" was just a quantity. In the Zhou system, the vassal state and the three armed forces, China's army is the most respected, followed by the upper army, and then the lower army. One army12,500, and 37,500 in the three armies. Zhou Li Xia Guan Sima said: "Whoever builds an army has 2,500 people in the army. Wang Liujun, three armies of a big country, two armies of a second country and one army of a small country. "

Chapter 44 of Feng Ming Meng Long's History of the Eastern Zhou Dynasty: "The old three armies are now joined by two armies, and * * * is the fifth army, which is second only to the system of the Emperor. Heroes are used to it, and military and political affairs are not lacking. "

The word "three armed forces" in China culture originated from the former, middle and later armed forces riding horses in the Spring and Autumn Period. At this time, the so-called "three services" are classified and their names are gradually changing.

At that time, big countries generally formed three armed forces, but the names of different countries were different. For example, Jin said,, Xia Jun; Chu Zhao, and the right army; Qi, Lu and Wu are collectively called the upper, middle and lower armed forces.

Wei said that the former army, the Chinese army and the rear army ... each have the rank of general and assistant, and the Chinese army will be the commander-in-chief of the three armies. The one in the middle is the boss.

With the evolution of the times, the upper, middle and lower armed forces are gradually replaced by the former, middle and rear armed forces.

After the Tang and Song Dynasties, this organization became a fixed organizational system of the army.

At this time, the main symbols of the three armed forces are various forces serving different combat tasks.

The former army is the pioneer; Zhong Jun is the main force, is the main force; The rear forces mainly serve as cover and alert tasks.

In the ancient army of China, the largest organizational unit was the army.

The establishment of the army has existed throughout the ages, but the number is different. In the Han Dynasty, five people had one martial arts, two martial arts were fires, five fires were teams, two teams were officials, two officials were songs, two songs were departments, two schools were schools, two schools were schools, and two schools were armies.

In ancient times, in any case, the "three services" usually referred to the army. Ancient science and technology were underdeveloped. Archery by boat can be regarded as navy at most, and it is impossible to fly into the sky. In modern times, our army can achieve it as long as it exists.

So today's army is still collectively referred to as the "three services", but this "three services" has a wider scope and mainly refers to the three services. It is different from the ancient "three armies", but the same thing is that they all represent the army to defend the country and the war strength of a country.