Historically, the United States has been a capitalist country. Wherever their capital expands, they invade. When the land has enough room for development, territorial expansion will naturally stop. The United States has become the most powerful country and the most developed country in the world, with GDP as high as 19 trillion US dollars and per capita GDP exceeding 50,000 US dollars. It is the target of immigrants from many countries. Mexico is full of violent crimes, drugs are rampant, the government's control ability is poor, and social security is naturally poor.
Every year, hundreds of thousands of people from Mexico and other African countries sneak into the United States from the US-Mexico border. In order to maintain its own resources, the United States prohibits refugees from entering and advocates the construction of the' Great Wall', because the number of shelters provided to once soft-hearted refugees is now as high as 2 million, and it is still growing. At present, the population of European refugees caused by the Syrian war has reached more than 300 million.
After the United States announced that it refused to open its doors to refugees and deployed heavy troops on the Mexican wall, the border crisis was triggered again. The US military has taken various measures, including the use of non-lethal weapons such as tear gas. Us president trump said that under any necessary circumstances, the us border guards have the right to shoot refugees, and the Mexican wall may become a red zone at any time. Now this area is about to become the biggest battlefield for' non-war' personnel.