I think it's only a matter of time before Iran attacks a neighbouring country again.
If Trump wins a second term, the gloves will be off - he won't need to keep the election promise of "no more wars," any more, because he'll be gone in January 2025, as per the 22nd Amendment of the U.S. Constitution, regardless.
If they do attack, Trump will retaliate with some form of military action. Then Russia will get involved, like they did in Syria, and it could be a mess. Like always, the UK will be dragged in and we haven't invested enough in defence to meet that demand.
Barely scraping 2% of GDP is frankly a joke, when we invest so much more in to bloated and poorly managed departments elsewhere. We should be investing at least 3!