Sino-American War

The thirty-year period that is often referred to as the Second Cold War is followed by what is widely considered to be the most destructive war in human history, the Sino-American War. This war originally involved only the United States its allies and the People's Republic of China but soon grew engulf India its allies, and the European Federation on the American side and the Russian Federation and Brazil on the Chinese.

Results
The end of the Sino-American War is often considered the beginning of the Crisis, as the depression that followed is believed to be one of the key factors that prevented mankind from resisting the chaos of man-made climate change.

Along geopolitical lines, in the Treaty of Tokyo that officially ended the war, the Russian Federation was split up into various states so it would not endanger the interests of its European counterpart. Tibet, Uyghurstan, and Inner Mongolia were released and the Third Chinese Republic created to govern the former Chinese core.