The five weeks of warfare that engulfed the Persian Gulf after the joint American and Israeli strikes of February 28, and ended only with a Pakistan-mediated ceasefire on April 7, failed to resolve the existential questions that had driven the conflict. Instead, this phase of a broader three-month confrontation dismantled many of the assumptions underpinning the regional order.

As diplomats prepare for the possible signing of a formal peace accord in Switzerland on June 19, one reality is increasingly clear: the Middle East has already changed, even if the wider international system has yet to fully absorb the implications.

The proposed agreement would establish a 60-day diplomatic framework that includes the lifting of naval restrictions, the release of $25 billion in frozen Iranian assets, and a temporary suspension of uranium enrichment. Yet the region cannot simply return to the status quo ante. The war altered not only military calculations but also perceptions of power, vulnerability, and credibility. In the Middle East today, perception has become as important as territory in shaping geopolitical order.

One of the conflict’s most notable developments was Pakistan’s emergence as a key diplomatic intermediary. In the absence of effective Western mediation, Islamabad positioned itself between Washington and Tehran, conducting intensive negotiations that continued even as prospects for peace repeatedly appeared to collapse.

Prime Minister Shehbaz Sharif credited military chief Field Marshal Asim Munir with sustaining the talks through their most difficult moments, describing a process that often appeared close to failure.

“Throughout this period, he was awake all day and night. There were many moments when it felt like the negotiations would come to a halt, but the army chief did not give up. If this journey had not continued, the dream of peace would have been shattered,” Sharif said.

The mediation effort received support from UN Secretary-General António Guterres and regional partners, including Qatar and Turkey. More significantly, it underscored a broader shift in regional diplomacy. Security management in West Asia is no longer the exclusive domain of Washington. Regional powers are increasingly shaping outcomes themselves.

A defining feature of the 2026 war has been the gap between Washington’s claims and the strategic reality that followed. The Trump administration argued that the strikes significantly degraded Iran’s nuclear infrastructure. Yet the campaign failed to permanently resolve the Iranian nuclear issue.

Iran retained sufficient command-and-control capabilities to coordinate retaliation, disrupt shipping through the Strait of Hormuz, and preserve uncertainty surrounding the status of its nuclear program. That uncertainty has since become one of Tehran’s most valuable diplomatic assets.

According to IAEA Director General Rafael Grossi, Iran still possesses roughly 440 kilograms of uranium enriched to 60 percent, material believed to be stored in fortified facilities beyond the reach of inspectors. The Congressional Research Service has likewise concluded that the full impact of the strikes remains uncertain. Facilities may have been damaged, but the essential components of nuclear capability—fissile material, expertise, and institutional knowledge—survived.

As a result, uranium dilution has become a major bargaining chip rather than a routine concession. What Washington sought to eliminate through military action now serves as one of Tehran’s strongest sources of negotiating leverage.

The most consequential legacy of the conflict may not be found inside Iran at all. Instead, it lies in the growing doubts surrounding America’s security guarantee in the Gulf.

For more than three decades, Gulf monarchies hosted American military installations and purchased vast quantities of U.S. defense equipment in exchange for what they believed was a reliable security umbrella. The events of 2026 exposed weaknesses in that arrangement.

Regional leaders watched as Patriot and THAAD systems struggled to provide comprehensive protection against coordinated Iranian missile and drone attacks. Whether entirely justified or not, a perception emerged that Washington remained more committed to defending Israel than its Arab partners.

The psychological consequences may prove more significant than the physical damage. Deterrence depends on belief. Once confidence in security commitments begins to erode, the framework built upon those commitments weakens as well.

Analysts continue to debate whether Gulf states were targeted because of their strategic energy infrastructure or their association with the United States. For regional governments, however, the lesson has been largely the same: vulnerability can no longer be dismissed. That perception has accelerated a strategy of hedging and diversification that increasingly defines Gulf geopolitics.

As confidence in American security guarantees declines, China has expanded its influence across the Gulf by aligning itself with regional demands for greater strategic autonomy.

This shift does not signal an immediate break with Washington. Gulf states remain dependent on American military capabilities, and Chinese systems cannot fully replace integrated U.S. defense networks. Nevertheless, Beijing has steadily deepened its economic and security relationships throughout the region, while Russia continues to maintain influence through energy cooperation and its longstanding ties with Tehran.

The result is a regional landscape in which American power remains significant but no longer enjoys uncontested dominance.

This changing environment also complicates Washington’s broader diplomatic ambitions. The Trump administration continues to pursue an expansion of the Abraham Accords, encouraging additional states to normalize relations with Israel. Yet these efforts face growing obstacles. Saudi Arabia continues to insist on a credible pathway toward Palestinian statehood, reflecting public sentiment that has hardened across much of the Arab world.

The Abraham Accords remain intact, but the assumptions that once supported their expansion have weakened. Regional governments are increasingly pursuing strategic autonomy while questioning the reliability of traditional security arrangements.

The June 19 accord may reduce immediate tensions and create space for diplomacy. What it cannot do is restore the geopolitical landscape that existed before the war. The conflict accelerated the emergence of a more fragmented and multipolar Middle East, one in which influence is distributed among a wider range of actors and credibility has become as important as military power. The agreement may mark the end of one phase of the crisis, but it also highlights the beginning of a new regional order.