1, first, destroy Korea.
South Korea, which is divided into three, has always been in the weakest position among the six Shandong countries. In addition, the territory of South Korea is particularly strange. Located in the central plains, the economic center, bordering on the royal fiefs of the Eastern Zhou Dynasty, it is strategically a battleground for military strategists.
Tactically, due to the long-term loss to other six countries in the military field, wars are all about losing more and winning less, and the territory has been eroded many times, resulting in the "sugar gourd"-shaped remaining territory. One weakness of this feature is that the territory connecting the upper and lower parts is relatively small and easy to attack and defend. Once it is broken, it is equivalent to being isolated before and after it is broken, like a kite with a broken line. As a result, South Korea will repeatedly lose its territory in a vicious circle until it dies.
Therefore, of course, Qin Huang first destroyed South Korea as the bridgehead to capture the Central Plains.
2. Second, destroy Zhao.
Zhao, who was riding and shooting in the later period, greatly increased his national strength and surpassed Qi Yan in military strength, becoming the only country in Shandong that can compete with him. Strategically, Zhao is located in the north, with vast grassland and relatively developed smelting industry. If Qin wins here, you can get a lot of horses and weapons. Moreover, Zhao is at the top of the center of the seven countries, and sending troops to Zhao can take advantage of it.
Tactically, the late ruler Zhao was fatuous and refused to be a good minister, which led to the defeat of the battle of Changping. In addition, after the bloody battle in Changping, he continued to be killed by the defending war in Handan and dozens of wars, and was repeatedly defeated by Qin. Zhao lost nearly one million troops, three or four million people, and his national strength was greatly damaged. In addition, Zhao has a bad relationship with its neighbors. It often fights with Yan and intrigues with Wei, and both have feuds. If Qin is divided, Zhao will be isolated and will fail.
It can be seen that Zhao was the second to be destroyed by Qin Huang, and the other four countries were deeply shocked. The strategy of uniting Qin was completely aborted, and Zhao was destroyed by Qin, which basically indicated that Shandong had no strength to fight Qin anyway.
3. Third, destroy Yan State.
Yan, located in the northernmost part of China, has North China Plain and Liaodong Peninsula. Yan has been actively communicating with nomadic people in the north, absorbing war experience and establishing friendly relations. Moreover, Yan has produced many talents, such as Jing Ke and yan dan, and once destroyed Qi. However, after the destruction of Zhao, the lips died and the teeth were cold, and Yan lost the barrier separating Qin from the west, so the war with Zhao was inevitable.
A brief analysis of the tactical factors shows that although there were warriors in Yan State, when the country perished, the monarch and subjects of the whole country had completely lost their determination and strength to confront Qiang Qin. Qin knows that Yan has a vast territory and many ethnic minorities. If a city and a place are occupied by Qin Jian, there will be huge casualties. Therefore, Qin adopted a diplomatic strategy of coercion and inducement. "Today ten cities, a rare night's sleep. I'll kill fifteen cities later tomorrow. " Militarily, the Yan state prematurely deployed all its main forces in the areas bordering the Qin state, scattered alone and lacking coordination. Qin concentrated superior forces to outflank Yan's main force and divide them one by one. Soon, the main strength of Yan was lost, and Qin destroyed Yan.
4. Fourth, destroy Wei.
Wei was once the most powerful country, but the self-proclaimed monarch and his subjects were willful, and they were defeated by Qi, Zhao and Qin many times. In the later period, there was only a broken sail left to linger in Daliangcheng. Strategically, Wei is located in the central part of the Central Plains, with developed commodity economy and dense population, which is a battleground for military strategists. Coupled with the weak national strength, Qin has annexed Hexi, Hedong, Hetao and other places, and after Zhao Yan was destroyed, in fact, the head of state of Wei has long lost his support, waiting for him is a file to destroy the country.
Tactically, Qin has long known that Wei's desperate efforts to concentrate national strength on defending Daliangcheng are actually harmful to Wei. In the war of national subjugation, Wei gave up the cities and fortresses around Daliang prematurely, and lost the opportunity of gradient consumption, so that it was easy to surround Daliang City. Then the river bank burst and covered Daliang City, and Wei surrendered.
Strictly speaking, Wei actually lost the land on the east side of the Hexi Corridor, which has symbolized his destruction and his national strength has been greatly sacrificed. The reason why he became the fourth one to be destroyed was because he relied on the two great powers of Qi and Chu, and Qin was careless, but it could not stop the overall situation.
5. Fifth, destroy the State of Chu.
Chu is the largest country among the seven countries, with a dense river network and a large population. After the Wuqi political reform, the national strength was greatly enhanced. However, the reform was not successful, and it was terminated by the old aristocracy in advance, and it began to decline rapidly in the middle and late period. Although it was a flash in the pan militarily, the most important thing was that Xianyang was almost captured during Qin Huiwang's period, and its comprehensive national strength continued to decline. Since the fall of Tian Lei, Qu Yuan was demoted and committed suicide. Chu basically has no power to dominate, but only a few.
Tactically, Qin was carried away by the previous victory. Because of suspicion, the King of Qin rejected the plan that veteran Wang Jian needed 600,000 troops to attack Chu, and instead appointed Li Xin, who lacked actual combat experience. In the war of national subjugation, the monarch and his ministers were United, successfully rebelled against the Qin Prime Minister who was originally Chu, returned to Chu, gained a lot of valuable information about Qin Jun, reused Xiang Yan, the only soldier left in Chu, and wiped out 200,000 Qin Jun who came to attack in the previous dynasty. And killed Li Xin (the ancestor of Li Guang later), but this did not reverse Gan Kun, but greatly deepened the hatred of Qin State towards Chu State. Qin Huang learned the lesson, reused veteran Wang Jian, and put 600,000 soldiers into Chu to fight. Wang Jian is wily. When he arrived in Chu, he didn't rush to kill the enemy, but built a fortress to stick to the confrontation. A large amount of grain is continuously shipped from Bashu, a land of abundance, so that 600,000 people in Qin Jun can eat and drink enough every day. Wang Jian organized the army to carry out various physical competitions and trainings beneficial to the unity of body and mind, and constantly killed the fighting spirit and spirit of the Chu army. Finally, Xiang Yan was defeated. Due to the large number of Qin Jun in general, Chu State can still be effectively interspersed among the vast Chu States to annihilate after dispersing its forces, and there is no geographical advantage until its demise.
6. Sixth, eliminate qi.
Qi is located in Shandong Peninsula, which is the farthest place from Qin. It is also the only remaining strength of the State of Qi, and it is understandable that the State of Qin will eventually perish.