> What's the goal of the US/Iran war?

It varies. Which is the problem.

I can think of a few:

1) Severely kneecap the Iranians' nuclear ambitions. This one might actually be working to an extent.

2) Severely kneecap the Iranians' military ambitions in the Middle East as a whole, particularly with respect to Israel. This remains unknown. Their neighbors seem content to give them a pass for launching missiles into their infrastructure, possibly on the grounds of shared religion. Maybe they'll get tired of it.

3) Cause regime change in Iran. Not happening now. Might not happen in the foreseeable future.