The imperial army was the central army of the Song Dynasty, and its soldiers were recruited from all over the country, or selected from the soldiers of Xiang Army and Xiang Army. The imperial army gradually expanded in the Northern Song Dynasty and increased to more than 800,000 people in the Qing Dynasty. The imperial army followed the Five Dynasties Houliang, and Zhao Kuangyin, the founding emperor of the Northern Song Dynasty, was the chief inspector of the imperial army in the later Zhou Dynasty. After the mutiny in Chen Qiao, Zhao Kuangyin established the Northern Song Dynasty, and in the early Song Dynasty, it set up a general inspector and a bodyguard pro-military department, which was called the Second Division. Later, the bodyguard pro-military division was gradually divided into the bodyguard Ma Junsi and the bodyguard Bu Junsi, and finally formed the Qiandian Division, the bodyguard Ma Junsi and the bodyguard Bu Junsi, also known as Sanya Division, which ruled all classes in front of the temple and reached the national imperial army. The commander of the imperial army set up all inspectors, deputy commanders, commanders, deputy commanders and officers.

The imperial army is generally composed of 100 people, with five commanders (battalions), five commanders as troops and ten armies as compartments. The carriage is divided into left and right sides, and the numbered troops belonging to Sanya are in the carriage. The military commanders are: Commander-in-Chief (Ma Jun is the military special envoy), Commander-in-Chief, Military Commander-in-Chief, Military Commander-in-Chief. Song Shenzong reformed the military system, implemented the "General Art of War", and organized Kaifeng County and most of the imperial troops into general organizations. Less than 3000 people are commanders, and more than 7000 people are commanders and deputies. The imperial army grouped into generals is called the general imperial army; An imperial army that has not been compiled as a general is said to be not an imperial army; The imperial army stationed in Beijing is called the Beijing Imperial Army.

Personally, I think that the 800,000 imperial coach is just an empty post written by Shi Naian, the author of Water Margin.