The 2018 Nuclear Posture Review (NPR) exhibits a long list of causes that may detonate a US nuclear first strike – including a worryingly vague attack on “allied or partner civilian infrastructure”. Even a clumsy false flag, for instance in the South China Sea, could lead to such a stand off.
https://www.zerohedge.com/news/2019-04-04/pentagon-obsession-china-china-china