The Land of Four Battles, meaning surrounded by enemies, is the standard land of four battles, with four different enemies.
In the Spring and Autumn Period and the Warring States, many princely states were located in the land of four wars.
For example, Zheng Guo, the north and south sandwiched between the Chu state and the Jin state, the east and west sandwiched between the Song kingdom and the Eastern Zhou Zheng state is located in the land of four wars, today's two major railway arteries, the Beijing-Guangzhou line (Beijing to Guangzhou) and the Longhai line (Lanzhou to Shanghai) on the Zhengguo boundary intersection, which shows the Zhengguo's position as the geopolitical center of the Central Plains at that time. It didn't take long for zheng guo, a small bully in the spring and autumn, and the territory was divided.

Figure - The three branches of the early Jin Dynasty
The three families were divided into Jin, and history came from the Spring and Autumn to the Warring States, and Zhao Wei and Han were actually the land of four wars.
Korea is sandwiched between Wei and Zhao, bordering the Zheng Kingdom to the east and the Chu State to the south, which can be said to be the land of four wars. But in the middle of South Korea, there is also an Eastern Zhou Luoyi, and South Korea can be said to be a war-free place.
The Zhao Kingdom was separated by the State of Korea and the State of Zhongshan in the middle, and the Western Taiyuan County, bordering the State of Wei, Korea, and the State of Zhongshan. To the east, Handan County bordered the States of Wei, Korea, Zhongshan, Wei, and Qi. Zhao Guo can be regarded as two pieces of land of four wars, and the geography is much worse than that of South Korea.
The State of Wei was similar to the State of Zhao, divided into east and west by Korea, with the western part being the capital anyi, and Hexi County intertwined with the State of Qin, and would inevitably lead to a great war with the State of Qin. The eastern part of Dong Commandery is not the core area, but is located in the Central Plains, adjacent to the Chu state of Qi and the Song state. The State of Wei was not only two places of four wars, but also faced the three strong forces of Qin, Chu and Qi at the same time, and its geography was even worse than that of the State of Zhao.
Tu - The State of Wei crossed the State of Zhao to attack Zhongshan
The situation of the Wei state is so severe, the east and west sides have expanded greatly, and a piece of the four wars has been launched to the north, let's look at this process.
First, the three armies of the State of Wei crossed the Yellow River in the west and attacked half of the west of the River of the State of Qin. In the following two years, the important towns of Yuanli and Wangcheng in the Qin state of Hexi were incorporated into the territory of the State of Wei. Before the aggressive offensive of the Wei army, Duke Jian of Qin was forced to abandon the Hexi line.
Subsequently, the State of Wei, with Le Yang as the main general, Zhai Jiao as the deputy general, and crown prince Wei As the overseer, crossed the Zhao state of Handan County to send troops to Zhongshan. In addition, Wu Qi commanded the hexi garrison, as a partial division, from the direction of Taiyuan County, to contain the Zhongshan state forces. After taking the Zhongshan Kingdom, the territory of the State of Wei was greatly expanded, equivalent to the territory of one more vassal state.
Shortly after The Marquis of Wei took the throne, the State of Wei occupied a large area south of the Yellow River in the Chu state, where Daliang and Yuguan were located.
At this point, the State of Wei reached its peak and its territory was very vast, with Hedong and Hexi in the west, Zhongshan in the north, and Dongjun and Daliang in the east. If the State of Wei could continue this situation, after thirty or fifty years, there was a great possibility of unifying the world.
Figure - The heyday of the State of Wei
However, the geographical situation of the State of Wei was really too bad, the three pieces of land in the west, north and east, did not want to be connected at all, were divided into three pieces by Han and Zhao, and each piece of land was the land of four wars, among the princes of the past and the present, the geography of the State of Wei in the early Warring States period was definitely the worst.