Key event

The United States and Iran sign a memorandum of understanding

17 Jun 2026 Essential

What happened

The Iranian President and the United States President sign a memorandum of understanding, hosted and mediated by Pakistan. It establishes a sixty-day negotiating window and, on the Iranian side, an undertaking to use best efforts for the safe passage of commercial vessels without charge for sixty days only. The United States lifts its naval blockade the following day and the strait reopens toll-free, though traffic stays well below normal.

The parties' own term is memorandum of understanding. Vigil does not relabel it a ceasefire, an armistice or a peace agreement, because none of the sources does. Its fourteen reported points have not been read in an official text and are not authored.

Confidence: Moderate

When17 Jun 2026
KindDiplomatic · Maritime

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Connected records

3 records that this event names, or that name it — every one an explicit reference in a published record, nothing inferred from subject matter.

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Analytical Notes1

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Where this fits

This is one entry in the Iran–Gulf timeline. The full Key Events surface carries every dated turning point with its filters and its essential subset, and this event in place shows what came before and after it. How Vigil grades, dates and sources its claims is set out in the methodology.