The United States and Iran have reached a sweeping peace agreement that halts all military operations “immediately and permanently,” bringing an abrupt end to more than three months of intense conflict that engulfed large parts of the Middle East, according to statements released Monday by both governments and confirmed by mediators.
The breakthrough was first announced by Pakistan, which played a central mediating role in back-channel negotiations, and was quickly followed by synchronized confirmations from Washington and Tehran. The agreement includes a full cessation of hostilities on all active fronts, including Lebanon, where cross-border escalation had become a secondary theater of the wider US–Iran confrontation.
An official signing ceremony is scheduled for June 19 in Switzerland, where senior representatives from both countries, alongside international guarantors, are expected to formalize the deal.
The announcement marks one of the most dramatic diplomatic reversals in recent US–Iran relations, following a conflict that saw sustained airstrikes, missile exchanges, and covert operations targeting senior political and military figures across Iran’s security establishment.
According to officials familiar with the negotiations, the agreement was reached after several weeks of indirect talks facilitated by Pakistan, which maintained open communication channels with both sides despite escalating violence.
The ceasefire framework reportedly includes guarantees of non-aggression, deconfliction mechanisms in contested airspace, and a phased withdrawal of remaining US naval assets from blockade positions in regional waterways.
While neither Washington nor Tehran has released the full text of the agreement, both confirmed that the terms include an “immediate cessation of all offensive military activity,” as well as commitments to avoid proxy escalation in Lebanon, Iraq, and the Red Sea corridor.
The US administration framed the deal as a stabilization measure following what officials described as an “unsustainable escalation cycle,” while Iranian officials characterized it as a “necessary end to aggression.”
In Washington, US President Donald Trump declared the agreement finalized in a social media post on Sunday, coinciding with his 80th birthday.
“The Deal with the Islamic Republic of Iran is now complete,” Trump wrote. “I hereby fully authorize the toll-free opening of the Strait of Hormuz, and, simultaneously herewith, authorize the immediate removal of the United States Naval blockade.”
He added: “Ships of the World, start your engines. Let the oil flow!”
The announcement signaled a major shift in US maritime posture in the Gulf, where naval assets had been deployed in support of blockade operations aimed at restricting Iranian military logistics and oil exports during the conflict.
US defense officials have not yet detailed the timeline for full naval repositioning, but early indications suggest a rapid de-escalation of maritime enforcement activity in the Strait of Hormuz, a critical global energy chokepoint.
The conflict, which began in late February, rapidly escalated into one of the most destructive confrontations involving Iran in decades. A sustained campaign of airstrikes—conducted by US and Israeli forces—targeted command centers, military installations, and intelligence nodes across Iran.
Among the earliest and most consequential casualties was Iran’s Supreme Leader, Ali Khamenei, who was reportedly killed within the first hour of the war on February 28 during a strike on a high-level meeting in Tehran.
Reports indicate that the strike also killed several members of his immediate family, including his daughter-in-law, daughter, and at least one grandchild. His son Mojtaba Khamenei is said to have survived the attack but sustained injuries. He has since assumed leadership responsibilities, though he has not appeared publicly.
State media in Iran has reported that Khamenei’s funeral arrangements remain pending, with ceremonies scheduled to begin in Tehran and continue through Qom and Mashhad in early July. His burial is expected to take place in his hometown of Mashhad after a multi-day period of national mourning.
Beyond the Supreme Leader, the war saw the systematic targeting of Iran’s senior political, intelligence, and military leadership, resulting in significant disruption within the Islamic Republic’s command structure.
Ali Larijani, a long-standing political figure and former parliamentary speaker, was killed on March 17 in an Israeli strike in the Tehran region. His death was widely viewed as one of the most significant political losses for the Iranian establishment after Khamenei.
Larijani had appeared publicly only days earlier at a pro-government rally, underscoring the rapid pace at which targeted strikes reshaped Iran’s leadership landscape.
In the military hierarchy, senior commanders were also killed or replaced in rapid succession. Gen. Mohammad Pakpour, who had assumed a top command role following earlier wartime losses, was killed on the first day of the conflict and later replaced by Ahmad Vahidi, a former interior and defense minister.
Hossein Salami’s earlier death during a preceding 12-day war had already triggered a leadership reshuffle within the Islamic Revolutionary Guard Corps (IRGC), setting the stage for further instability as the new conflict escalated.
Among the most prominent military losses was Adm. Alireza Tangsiri, commander of the IRGC Navy and a veteran of the Iran-Iraq War. Tangsiri had been responsible for Iran’s naval strategy in the Persian Gulf since 2018 and was closely associated with Iran’s doctrine of asymmetric maritime deterrence.
Israeli defense officials had previously described him as a central figure in operations involving the mining and obstruction of maritime routes in the Strait of Hormuz, a claim Tehran consistently denied.
Ali Shamkhani, another senior security official with decades of experience in Iran’s defense and political establishment, was killed in an airstrike on the first day of the war. He was later given a public funeral in Tehran, where thousands reportedly attended.
Shamkhani had previously survived an earlier strike during a previous escalation, though reports at the time incorrectly indicated his death before he re-emerged briefly in public life.
The war also decimated key components of Iran’s intelligence and defense leadership. Intelligence Minister Ahmad Khatib was killed in Tehran on March 18 during an airstrike. Rights groups had previously accused him of overseeing internal security crackdowns during periods of civil unrest.
Defense Minister Mohammad Nasirzadeh, a veteran of the Iran-Iraq War appointed in 2024, was also killed on the first day of the conflict, marking one of the earliest blows to Iran’s formal defense hierarchy.
Additional casualties included senior coordination officers responsible for aligning operations between the IRGC and the regular armed forces, including key figures within the Supreme Leader’s office.
Brig. Gen. Ebrahim Mousavi, who had only recently assumed a senior coordination role following the death of his predecessor, was killed early in the conflict, further disrupting military command continuity.
The Basij paramilitary organization also suffered major leadership losses. Gen. Reza Soleimani, a senior commander within the organization, was killed on March 17 in an airstrike.
The Basij, a volunteer force under the IRGC, has long been a central pillar of internal security in Iran and is widely associated with domestic protest suppression operations.
Other senior IRGC-affiliated figures, including spokespersons and missile program coordinators such as Ehsan Naini, were also killed in March strikes. Prior to his death, Naini had publicly described Iran’s missile production capacity as continuing at full operational strength despite the ongoing war.
The ceasefire agreement, if fully implemented, would mark a dramatic shift in regional power dynamics following months of escalation that drew in multiple proxy theaters, including Lebanon and maritime routes critical to global trade.
However, analysts caution that the depth of leadership losses inside Iran, combined with rapid wartime succession, could leave long-term uncertainties about internal stability and chain-of-command cohesion, even in the absence of active hostilities.
Similarly, the United States faces questions about the durability of its withdrawal commitments and the future of its naval posture in the Gulf, particularly in relation to energy security and freedom of navigation operations.
The upcoming signing ceremony in Switzerland is expected to serve as the first formal test of the agreement’s implementation mechanisms, with international observers watching closely for early signs of compliance or fragmentation.
For now, however, both Washington and Tehran appear aligned on a single conclusion: the war has ended, abruptly and comprehensively, leaving behind a transformed political and military landscape across the Middle East.
