The method of measuring the army in ancient times was not quite the same as it is now, which is why there were many ancient military forces. Moreover, some people always falsely report their troops to increase their momentum, so those troops have a lot of water. If you calculate the strength of modern warfare by ancient measuring methods, you will find that the scale of ancient warfare is still too small.
In ancient wars, soldiers, auxiliary soldiers and militia were counted, but in modern times, it is not. The ancients paid attention to it? The soldiers and horses have not moved, and the food and grass go first? Logistics has always been the most important part of an army. It is often the auxiliary soldiers and militia who transport grain and grass support logistics that are the big heads of the troops. Their numbers are often much larger than those of war soldiers, which is why there were hundreds of thousands of military forces at that time.
This calculation method of counting logistics arms into the total force existed in the Spring and Autumn Period and the Warring States Period, but the auxiliary forces at that time had strong combat effectiveness. During the Spring and Autumn Period and the Warring States Period, various countries have been at war. In the years of war, the people of the Central Plains have a very high level of war literacy, which can be called "all the people are soldiers". At that time, auxiliary soldiers could take up arms and fight immediately when the war was unfavorable, which is why so many people were killed in Tian Lei, and no one could let them go.
Of course, there are also pure false reports, such as Cao Cao. On the eve of Battle of Red Cliffs, Cao Cao claimed that he had a million heroes. This is absolutely impossible, and the logistics soldiers can't reach this figure. After many bosses' inference, Cao Cao's strength at that time was more than 100 thousand points at most, and it was absolutely impossible to have one million.