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International Law Is Clear. Trump’s War on Iran Is Illegal

There's nothing preemptive about the US-Israeli strikes, and there’s certainly no legitimate self-defense claim, explains international law expert Alonso Gurmendi.

Alonso Gurmendi's avatar
Alonso Gurmendi
Mar 01, 2026
∙ Paid
Trump announces US-Israeli strikes on Feb. 28, 2026. Photo by US President Trump Via Truth Social/Anadolu via Getty Images

“Preemptive strikes” – meant to “eliminate imminent threats from the Iranian regime” and prevent Iran from getting a nuclear weapon.

That’s how the US and Israel are attempting to justify their war on Iran – and if you’re only reading Western media, you may take that as fact. But the reality is, there’s nothing preemptive about these strikes, and there’s certainly no legitimate self-defense claim.

International law is clear. Trump’s war on Iran is illegal. Here’s why:

What International Law Says

Under the UN Charter, states are prohibited from using unilateral force, except in two cases: (1) when authorized by the UN Security Council or (2) in self-defense.

The US and Israel did not go to the UN Security Council ahead of Saturday’s strikes on Saturday. That leaves self-defense as the only possible justification under international law. That justification in this case, however, falls short when considering the facts.

‘Israel’s Right to Defend Itself’

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