You forgot to mention that Russia stated in clear and unambiguous terms that an attack on Tehran would be considered as an attack on Moscow.
I understand your not wanting to overwhelm your readers but this war will be unprecedented in human history and be blamed on Israel, all fitting into biblical end time eschatology.
America is the main target
Iran will strike US forces,Bases,Naval Carriers and ships in a lightning surprise attack that will make Pearl Harbor look like a Sunday picnic
From Jeremiah 51
1THUS SAYS the Lord: Behold, I will raise up against Babylon(America) and against those who dwell among those rebelling against Me a destroying wind and spirit;
11The Lord has stirred up the spirit of the kings of the Medes [who with the Persians will destroy the Babylonian(American) Empire], for His purpose concerning (America) Babylon is to destroy it;
12Set up a standard or signal [to spread the news] upon the walls of Babylon! Make the watch and blockade strong, set the guards, prepare the ambushes! For the Lord has both purposed and done that which He spoke against the inhabitants of Babylon.
13O [Babylon](America) you who dwell by many waters, rich in treasures, your end has come, and the line measuring your life is cut.
The overriding agenda which stumbling,bumbling,blind humanity ignores is what God is doing now.
He is setting up the trap for the nations to come up against Israel after this devastating nuclear war.
I will gather all nations and will bring them down into the Valley of Jehoshaphat, and there will I deal with and execute judgment upon them for [their treatment of] My people and of My heritage Israel, whom they have scattered among the nations and [because] they have divided My land.