In modern times, one way to invade China by land is to move from North Korea to the Northeast and enter the Central Plains

Yes. Japan's war of aggression is.

In 1927, China's national revolution developed rapidly. While Japan planned the independence of "Manchuria and Mongolia", it sent troops to Jinan to prevent the National Revolutionary Army's Northern Expedition.

From June 27 to July 7, the Japanese Cabinet held the "Eastern Conference" in Tokyo, which was attended by the Ministry of Foreign Affairs, the Ministry of Army and Navy, the General Staff Headquarters, the Kwantung Army and experts on China issues, and formulated The "China Policy Program" was formulated and the expansion policy of first occupying Northeast China, Inner and Outer Mongolia, and then occupying the whole of China was established.

Subsequently, Japanese Prime Minister Tanaka Giichi presented the "Tanaka Memorial" to the emperor, clearly stating that "if you want to conquer China, you must first conquer Manchuria and Mongolia; if you want to conquer the world, you must first conquer China." The overall strategic blueprint for expansion. The release of the "China Policy Program" and the "Tanaka Memorial" marked the inevitability of Japan's war of aggression against China.

On June 4, 1928, when the special car of Feng Faction warlord Zhang Zuolin drove to the bridge tunnel at the intersection of the Beijing-Fenghuang Railway and the South-Manchuria Railway east of Huanggutun Station, it was buried under the bridge by the Japanese in advance. The explosive exploded to pieces and Zhang Zuolin died after being seriously injured. This is the "Huanggutun Incident" that caused a sensation at home and abroad.

On September 18, 1931, Japan launched the September 18th Incident and invaded Northeast China, thus forming the first source of war in the east of the world.

Extended information:

The reason why Japan first occupied Northeast China during the Anti-Japanese War, rather than elsewhere:

First of all, Japan occupied the Korean Peninsula first. Seeking further expansion into China, Japan had completely controlled North Korea at that time, so the next plan to invade China started from Northeast China, which is closest to North Korea.

What is the Northeast? It was the birthplace of the Manchu royal family and nobility. During the Qing government, for this birthplace, people from other places were not allowed to migrate to the Northeast and the number of people was controlled. Therefore, there were few people in the Northeast and they could not resist. It would be too drastic and suitable for cultivating a puppet regime.

Second, we want the Northeast to be easier to attack than other places. The Central Plains region has been a political, economic and cultural center since ancient times. It has many experts, many experts and strong military power. Little Japan will definitely not pick a hard nut. The coastal areas are almost all areas controlled and occupied by Western powers. Little Japan will not fight against Western powers so easily.

The southern region is full of hills and paddy fields, which is not conducive to Japan's landing operations, and the population is more mixed. Little Japan will not do such a risky thing.

So compared to the Central Plains, coastal areas and southern regions, the Northeast is the easiest weak spot to attack. Japan won the battle with Russia and occupied the Korean Peninsula. At this time, it was very ambitious, so I chose the Northeast, which is close to North Korea and Russia, and can be concentrated and controlled easily. If I choose the South or the Central Plains, the troops will be too scattered and easily defeated one by one.

Thirdly, little Japan is an island country and what it lacks most is resources. And those of us who study history and geography all know that the Northeast is the richest in mineral resources and energy. The Northeast has convenient transportation, railways, rich resources, industry, and minerals. These are all things that little Japan lacks. The mineral resources in the Northeast It can provide a lot of help for Japan's military expansion, so Japan's first choice is Northeast.

Fourth, Northeast China is rich in food resources. Whether in ancient times or in modern times, food and grass are indispensable materials for an army. Without food, even a powerful army will not be able to fight to the end.

The Northeast has a higher latitude, sufficient sunlight, and rich heat. It is also a typical black soil with fertile land and high grain yield. After Japan occupied the Northeast, it began to develop land to grow grain. It can be seen that small Japan has great demand for grain. How big.

Fifth, the strategic location of the Northeast is important. The Northeast is between Soviet Russia and the North China Plain. As we have said before, if Japan conquers other places first, it will easily disperse its troops, but this will not happen in the Northeast. The problem is that the north can resist the Soviet Union's sending troops, the south can prevent the Nationalist Army from going north, and the east can also protect the North Korea it just occupied.

And the Northeast is also far away from the Nanjing government of the Kuomintang. As the saying goes, the sky is high and the emperor is far away. This is what it means. Therefore, the Northeast is a good place for Japan to station troops. In fact, little Japan had already been eyeing the Northeast region during the Sino-Japanese War of 1898, and even shouted the slogan "I would rather give up the mainland than Manchuria", so it is not surprising that it occupied the Northeast first.

Reference: Baidu Encyclopedia - Anti-Japanese War