Just when you thought the US-Iran situation might be settling into something resembling a boring diplomatic routine, President Donald Trump has blown up the ceasefire - allegedly both figuratively and, near the Strait of Hormuz, somewhat literally.

According to The Guardian, Trump publicly labelled Iranian leaders 'scum' and 'vicious, violent people', while declaring the fragile ceasefire between the two countries effectively over. Diplomatic subtlety, as usual, took the day off.

So what actually happened?

The breakdown did not come out of nowhere - or at least, Tehran is insisting it didn't. Iran accused the United States of violating the terms of the ceasefire agreement first, pointing to two specific American moves that apparently crossed the line:

  • US military strikes launched in the area around the Strait of Hormuz, one of the world's most critical oil shipping chokepoints.
  • The revocation of a temporary sanctions waiver that had allowed Iranian oil exports to continue during the ceasefire period.

From Iran's perspective, those two actions - military and economic - constitute a clear breach of whatever agreement had been holding things together. The US position, per Trump's very measured and statesman-like social media energy, seems to be that the other side are scum and that's that.

Why the Strait of Hormuz matters (a lot)

For those who skipped geography class, roughly 20% of the world's oil passes through the Strait of Hormuz. Any military activity near it tends to make global energy markets extremely nervous, extremely fast. Analysts and oil traders alike will be watching the situation with the kind of white-knuckle attention usually reserved for championship sports finals - speaking of which, the US men's national soccer team also had a rough week, exiting the FIFA World Cup in a loss that is generating its own share of national despair. The Guardian covered both in the same newsletter, which tells you everything about the current American mood.

Where things stand

As of now, hostilities between the US and Iran have officially resumed according to both sides, just with very different stories about whose fault that is. No further details about casualties or the specific targets of the Hormuz-area strikes have been confirmed in the available source material.

What is confirmed: a ceasefire that was already being described as 'fragile' has collapsed, the president of the United States called a foreign government's leadership 'scum' in public, and the world's most important oil shipping lane just got a lot more tense.

Cool, cool, cool.