If Iran kills thousands militarymen in ME, it will be justified a American nuclear first strike against Iran, and then it can happen everything after that.
Iran has shown his intention to do it.
https://www.presstv.ir/Detail/2023/...aeli-regime-American-occupation-troops-region
The same one decade ago when American aircraft carriers passed Hormuz among Iranian threats. If Iran sink a American carrier, everything will be justified.
You can be the most powerful person in USA (i.e. George Soros) and you can't never order a first strike against against Russia and China even if you want to do it, USA laws and state way of working dont allow that without a big previous reason.
But with several thousands dead, everything can happen.
The question should be asked in the reverse way, if USA wants to start WWIII what they need do before to do it? They need a Iran war.
WWIII reason is China and oil/raw materials running out, it's not related to Iran, Iran is the excuse, and USA behavior against Iran is strange since one decade ago, making provocaitons.
en.wikipedia.org