The U.S. and Iran signed a memorandum of understanding on June 15, 2026 [5], to end active combat operations between the two nations.

This agreement aims to stabilize the region and secure vital shipping lanes after a conflict sparked by U.S. and Israeli attacks against Iran in February 2026. The resolution of these hostilities is critical for global energy markets, and maritime security in the Persian Gulf.

President Donald Trump (R) said he was pleased that the signing process was completed. He said that parts of the Strait of Hormuz have already been reopened.

The deal involves the lifting of U.S. port blockades and the full opening of the Strait of Hormuz. A U.S. government official said that ships passing through the strait will be allowed to do so free of charge for 60 days [3].

While the announcement of the memorandum occurred on Monday, a formal signing ceremony is scheduled to take place in Switzerland on June 19, 2026 [4]. The agreement was reached through coordination between President Trump, Vice President JD Vance (R), and Iranian Parliament Speaker Mohammad Bahadorbadi Gharibfahm.

Government officials said that the full details of the memorandum will be released to the public soon. According to a U.S. government official, the specifics are expected to be published within 24 to 48 hours [2]. Other reports specify the window as within 48 hours [1].

The diplomatic breakthrough follows months of tension that threatened to disrupt one of the world's most important oil transit chokepoints. The shift toward a memorandum of understanding suggests a phased approach to de-escalation before a permanent treaty is established.

“The United States and Iran signed a memorandum of understanding on June 15, 2026, to end active combat operations.”

The agreement represents a strategic pivot to avoid a full-scale regional war that could have spiked global oil prices. By focusing on the Strait of Hormuz and port blockades, the US and Iran are prioritizing economic stability and maritime commerce over immediate political resolution. The 60-day grace period for shipping serves as a confidence-building measure to ensure both sides adhere to the ceasefire before the formal ceremony in Switzerland.