Wei is the strongest country with a population of 6 million and the largest land area. The total force is 2 million, and the standing army 1 10,000. There are many talents It is not bragging to say that there are millions of soldiers and tens of millions of soldiers in history. Secondly, especially in its heyday, the area of Wu once surpassed that of Wei, but most of the south belonged to the wild mountainous areas, and many places were undeveloped and sparsely populated. Compared with Wei Zhongyuan, it mainly depends on the water army to win. Shu has the weakest national strength, the smallest area, a population of less than 2 million and a shortage of talents. After the Battle of Xiaoting in Wu and Shu, the population suffered heavy losses. Therefore, Zhuge Liang sent troops to the Northern Expedition many times, but at most it was about 200,000. Wei usually fought 300,000 to 400,000.