Politically, for example, 50 years later, the military declassified the cause of the Korean War, because both China and the United States considered it. Our country is afraid that if South Korea reunites South Korea, the US military will invade China, and the US military is afraid that if North Korea reunites South Korea, China's army will invade Japan and threaten the US mainland after occupying Japan. So both sides are considering whether to send troops. They will have economic losses if they send troops, and their territory will be threatened if they don't send troops. Therefore, both sides choose to send troops in the "prisoner's dilemma" mode, and both sides will lose in the end.
Practical military examples: Taiwan Province Province wants to buy American F 16, China wants European arms sales to China, and the governments of both regions are spending a lot of money on weapons, thus losing the country's economic development. This is also a prisoner's dilemma model, and everyone is worried that it will be bad for them if they go to war. If I don't have advanced weapons and you have advanced weapons, then I will suffer. If I have advanced weapons and you don't, I will benefit. So I must have advanced weapons. As we all know, if a peace treaty is reached between the two sides of the strait, both sides will not buy advanced weapons and put all their funds on economic development and people's income, then it will be a real win-win situation.
Only I answered with my heart, so I can't summarize what I copied downstairs. The people behind copied Baidu's, LZ said, Baidu's don't.