U.S. President Donald Trump and Iranian President Masoud Pezeshkian signed a peace agreement on June 18, 2026, to end a four-month war [1, 4].

The deal aims to stabilize one of the world's most critical maritime corridors and prevent further escalation between the two nations. By reopening the Strait of Hormuz, the agreement seeks to restore global shipping routes that were disrupted during the conflict.

The pact focuses on halting active fighting and establishing a framework to address Iran's nuclear program [1, 3]. This diplomatic shift follows a period of intense military tension that saw 127 vessels redirected due to the Iranian blockade [3].

While the agreement was signed, it faces domestic political challenges in the U.S. The Republican-majority House recently passed a resolution limiting the president's powers regarding Iran by a vote of 215 to 208 [3]. This legislative move indicates a divided congressional approach to the administration's strategy in the region.

Follow-up talks are expected to take place in Switzerland to finalize the details of the ceasefire and nuclear negotiations [3]. The transition from active combat to diplomatic dialogue comes after months of volatility that affected international energy markets, and regional security.

Despite the signing, some reports have remained contradictory regarding the finality of the deal. Some sources said a deal was only expected in the coming week, while others suggested the two nations remained on the brink of war [1, 3]. However, the official signing on June 18 marks the first formal attempt to resolve the four-month conflict [1].

U.S. President Donald Trump and Iranian President Masoud Pezeshkian signed a peace agreement on June 18, 2026.

The agreement represents a strategic attempt to decouple global energy security from the geopolitical rivalry between Washington and Tehran. While the reopening of the Strait of Hormuz provides immediate economic relief, the House resolution limiting presidential power suggests that the deal's long-term sustainability depends on whether the administration can secure legislative buy-in for its nuclear diplomacy.