The United States and Iran signed a preliminary agreement on June 18, 2026, to end hostilities and reopen the strategic Strait of Hormuz [1].

This agreement marks the first presidential-level deal between the two nations since the 1979 Islamic Revolution [5]. It aims to stabilize global oil markets and resolve a conflict that saw 127 vessels redirected during an Iranian blockade [2].

The agreement consists of a 14-point memorandum of understanding [4]. President Donald Trump and President Masoud Pezeshkian reached the deal to restore maritime traffic to one of the world's most critical shipping lanes.

Despite the diplomatic breakthrough, military tensions remained high. The U.S. conducted strikes on Iranian radar sites located at Goruk and Qeshm Island in the Strait of Hormuz [3]. U.S. officials said the strikes were carried out in self-defense following drone threats from Tehran [3].

Political friction within the U.S. has further complicated the deal's implementation. The Republican-majority House of Representatives passed a resolution to limit the president's powers regarding Iran [2]. The resolution passed with a vote of 215 to 208 [3].

While some observers have described the memorandum as a historic step toward peace, the immediate return to military action suggests a fragile truce. The U.S. government continues to balance diplomatic efforts with security measures to protect regional interests.

The first presidential-level deal between the two nations since the 1979 Islamic Revolution.

The simultaneous signing of a peace memorandum and the execution of military strikes indicates a 'dual-track' strategy where diplomacy is used to manage economic stability while military force is maintained to deter aggression. The House resolution suggests that the executive branch lacks a unified domestic mandate, meaning any long-term normalization of relations will likely face significant legislative hurdles in the U.S.