The U.S.-Israeli war against Iran has exposed a reality many policymakers long preferred to avoid: The deterrence model that governed the Gulf for decades is no longer working as intended.For years, the region operated in the gray zone — covert strikes, proxy warfare, and carefully managed escalation. Iran built a strategy around missiles, regional partners, and nuclear latency.The United States underwrote Gulf security without direct war. Saudi Arabia and its neighbors relied on that umbrella while hedging against its limits, investing in missile defense and selective partnerships. There were rules, even if unwritten.That world is breaking down.The two-week ceasefire announced last week between the United States and Iran, brokered by Pakistan after 40 days of sustained bombardment, illustrates the point. What has emerged is not a durable settlement but a fragile pause, already strained by continued Israeli strikes on Lebanon, disputed terms over the Strait of Hormuz (and now a U.S. naval blockade), and Iranian accusations of violations. The ceasefire is less a return to order than a snapshot of its absence: ad hoc, conditional, and dependent on a mediator whose security relationship with both Washington and Tehran is itself constrained.What is emerging is not simply more escalation, but a different kind of conflict: direct, sustained confrontation without clear evidence that overwhelming force can deliver decisive political outcomes. The scale of the current campaign makes this plain. U.S. and Israeli operations have targeted Iran’s nuclear infrastructure, missile networks, and command systems at a tempo comparable to the opening phase of the 2003 Iraq War. By mid-March, U.S. and Israeli forces had conducted over 15,000 strikes across 26 of Iran’s 31 provinces with the U.S. military buildup described as the largest in the Middle East since 2003. Early reporting and official summaries confirm a broad campaign targeting Iranian leadership, nuclear sites, and missile forces across the country. Yet weeks into the conflict, Iran retains a meaningful portion of its missile arsenal and continues to strike across the region. U.S. intelligence assessments indicate that roughly a third of Iran’s missile arsenal has been confirmed destroyed, with another third likely damaged or buried in hardened underground sites. Separate analysis from the Center for Strategic and International Studies estimates that Iran’s missile launches fell sharply after the opening days of the war, while the Israeli military claimed that around 70 percent of Iran’s ballistic missile launchers had been disabled by day 16. However, U.S. intelligence assessments disclosed by the Wall Street Journal suggest a different picture: Although more than half of Iran’s estimated 470 launchers had been destroyed, damaged, or trapped underground, many were likely repairable or recoverable. Iran’s missile stockpile had been roughly halved, but Tehran still retained thousands of short- and medium-