U.S.-Iran Conflict Escalates: Ceasefire Collapses, Gulf Military Strikes Surge, and Strait of Hormuz Closure Threatens Global Oil Supply

Large-Scale Military Strikes and Retaliations (June–mid-July)

• June 11: Iran and the U.S. exchanged fire for a second day, with Iran launching attacks against Kuwait and Bahrain after U.S. air and cruise missile strikes. Trump warned Tehran would "pay the price" for stalled negotiations .
• June 26: The U.S. struck Iranian missile and drone storage locations and coastal radar sites in response to an Iranian drone attack on a cargo ship, marking the most significant test of the then-week-old interim understanding .
• June 28: Iran retaliated with drone and missile strikes against Bahrain and Kuwait in response to U.S. attacks on targets in southern Iran .
• July 7–8: Iran's Revolutionary Guards struck three vessels in the Strait of Hormuz and then targeted U.S. military sites in Bahrain and Kuwait. The U.S. responded with new airstrikes near the Strait .
• July 10: The U.S. carried out a new round of airstrikes hitting approximately 90 targets in and around Tehran, hours after Trump warned he would escalate unless Iran halted its shipping attacks .
• July 11–12: The IRGC struck a commercial cargo ship and declared the Strait closed "until further notice." The U.S. conducted further strikes on July 12 in retaliation for an attack on a Cyprus-flagged container ship .

Strait of Hormuz: Disruption and Closure

The Strait of Hormuz, through which about a fifth of global oil supply transits, has been at the center of the conflict. Maritime traffic was already reduced to below 10% of normal levels by early April . On July 7, the threat level was raised to "severe" by the U.S.-led naval coalition, which warned that "deliberate hostile action" by Iran was "likely" . On July 11, the IRGC declared the Strait "closed until further notice" after striking a vessel that attempted an unauthorized route, warning of a "severe response" to any retaliation . On July 12, the IRGC fired a warning shot at another vessel attempting to transit, reiterating the closure, and commercial ship traffic fell back to near-record lows—only 14 commercial vessels crossed on one day .

Netanyahu's Warning and Israel's Posture

Israeli Prime Minister Benjamin Netanyahu has issued multiple escalating warnings throughout the conflict:

• June 8, 2026: After Israel launched retaliatory missile strikes on Iran, Netanyahu said "fire is on hold" but warned that Israel would respond with "overwhelming force" if Iran or Hezbollah resumed attacks .
• July 14, 2026 (most recent): Speaking at the Negev Conference in Dimona, Netanyahu warned: "Do not count on it being quiet if you attack us... If Iran attacks Israel again, it will face a much more powerful response" than in previous confrontations .

Israel has maintained a posture of readiness throughout. In early 2026, Netanyahu lobbied Trump for joint military strikes on Iran . By March, the NYT reported that Israel was racing to hit Iran hard while it still could, fearing a ceasefire could halt operations . In April, Netanyahu stated Israel remained prepared to "return to battle" against Iran at any moment . On July 9, Netanyahu spoke directly with Trump about the U.S. strikes on Iran as the White House prepared for a prolonged escalation .

Diplomatic Prospects

Diplomatic prospects are highly uncertain and currently dim. While the June 17 MoU envisioned a path toward renewed nuclear talks , the agreement collapsed within weeks amid mutual accusations of violations . An Iranian delegation traveled to Oman in mid-July to continue indirect negotiations via mediators, even as the U.S. conducted further strikes . However, the Arms Control Association assessed that negotiators face "significant obstacles" to a final deal, with fighting continuing alongside the talks . The CFR global conflict tracker notes the ceasefire appears "on the verge of collapse" as both sides trade strikes over alleged violations . As of July 14, observers conclude the two countries have "reverted to a pre-MoU conflict state" .