Taiwan is a foregone conclusion at this point. That's why the US government forced TSMC to set up fabrication plants in Texas at such short notice.
They know that the island is at the mercy of the CCP and that the US Navy cannot do much to rescue it. Taiwan lacks the massive strategic depth that Ukraine has, along with the latter's advantage of bordering other NATO countries. Taipei is an island that is completely surrounded by the PLAN and the CCP can mobilize much faster than the US Navy can. They showed their reach when Nancy Pelosi visited Taiwan by circling the entire island in live fire drills.
Ukraine is a forgotten war. There will be some token European support to them in the coming months and then that too will be closed. Putin will walk into Ukraine, take everything east of the Dnipr River, and reduce Ukraine to the Kiev and other western parts that border Poland, Hungary and Romania.
The way the American deep state treats Israel, If things go out of hand, the USN will get involved in Iran big time.
Iran does not have the resources to start a war with the US. It can fight a sustained defensive war, using a mix of its massive missile arsenal as well as its terrain, somewhat like what Vietnam did. Iranian tactic would rely more on provoking the US to draw US forces into Iran, rather than going out there to get American forces. They will simply be gunned down really, really badly.
NATO is the US and the US is NATO. There is no concept of "NO" in the alliance. If one goes in, all go in. That's how it is. If you think that countries like the UK, Germany, Poland, Italy, Spain, Portugal, etc. have any say in whether or not to participate in a war, then you are sorely mistaken.
The only ones with the gall to say "
Va te faire foutre" to the Americans are the French. Given that Paris has another thing going in its African sphere of influence, they might as well flip the bird on the Americans.
If Iranians get involved against Israel at this stage, you can bet your bottom that the US will get involved. They might use standoff weapons to destroy Iranian support, but they will definitely get involved.
Nah we won't. Not unless the PLA does something terribly foolish in its attempts to flex itself in the meanwhile.