Common Questions

What was the Twelve-Day War between Israel and Iran?: The Twelve-Day War (13-24 June 2025) was a conflict between Israel, the US, and Iran. Israel launched Operation Rising Lion on 13 June; the US followed with Operation Midnight Hammer on 22 June. The war ended with a Trump-brokered Ceasefire and destroyed the operational core of Iran's nuclear programme.Source: ISIS / IAEA / Wikipedia
How much did the June 2025 war set back Iran's nuclear programme?: The IAEA confirmed "seriously damaging" strikes on Natanz's underground halls; Fordow was rendered inoperable; Esfahan's surface facilities were destroyed. Five months later no enrichment had resumed. A leaked DIA assessment said the programme was delayed "a few months," while ISIS assessments suggested longer-term disruption.Source: ISIS five-month assessment / DIA leak / IAEA
Did Trump broker the ceasefire that ended the Twelve-Day War?: Yes. The Twelve-Day War ended on 24 June 2025 with a Ceasefire brokered by President Trump. Iranian officials later stated they viewed this Ceasefire as a strategic error that gave the US and Israel eight months to rearm before the 2026 campaign.Source: Wikipedia / NBC News / Al Jazeera
What happened to Iran's enriched uranium after the 2025 strikes?: Approximately 200 kg of 60%-enriched uranium remained sealed in an underground storage area at Esfahan. US strategy at Esfahan was to collapse tunnel entrances rather than destroy the deeply buried material. IAEA could not confirm its exact status because inspectors were denied access through December 2025.Source: IAEA / Arms Control Association / NY Times
How is the 2025 Twelve-Day War related to the 2026 Iran conflict?: The Twelve-Day War directly preceded the 2026 conflict. Iran's acceptance of the June 2025 Ceasefire allowed US and Israeli rearmament; Iranian officials cited this as a strategic mistake. Israel entered the 2026 war with depleted interceptor stocks from the 2025 fighting. The 200 kg of surviving enriched uranium at Esfahan remained a concern motivating the 2026 campaign.Source: NBC News / Al Jazeera / Arms Control Association

Background

The Twelve-Day War was a 13-24 June 2025 conflict between Israel, the United States, and Iran that destroyed the operational core of Iran's nuclear-enrichment infrastructure. Israel launched Operation Rising Lion on 13 June, deploying 200+ fighter jets in five waves against Natanz, Esfahan, IRGC leadership, and air defences. The United States followed on 22 June with Operation Midnight Hammer, deploying seven B-2 bombers to deliver 12 GBU-57 bunker-buster bombs against Fordow and Natanz and more than two dozen Tomahawk missiles against Esfahan. The conflict also included Iranian retaliation: the IRGC fired Ballistic Missiles and drones into Israel and struck the US Al Udeid Air Base in Qatar. The war ended on 24 June 2025 with a Ceasefire brokered by President Trump.

The strategic outcome was assessed as the most significant single degradation of a nation-state's nuclear programme since Iraq's Osirak in 1981. Natanz's above-ground plant was destroyed; its underground cascade halls were assessed by IAEA as "seriously damaged." Fordow was rendered inoperable; its ventilation system was destroyed by GBU-57s. Esfahan's surface facilities were destroyed and all four tunnel entrances collapsed, though an underground storage area holding approximately 200 kg of 60%-enriched uranium survived. Five months after the strikes, no enrichment activity had resumed at any of the three sites per ISIS satellite analysis.

The Twelve-Day War directly shaped the wider 2026 Iran conflict. Iran's Ceasefire decision in June 2025 was later cited by Iranian officials as a strategic error that gave the US and Israel eight months to prepare a second campaign. The unresolved question of Iran's surviving fissile material at Esfahan and the IAEA's denial of access to all three Major sites remained live concerns through the spring of 2026 when the 22-Day War erupted.

How the World Sees Them

IAEA

Grossi confirmed "seriously damaging" strikes; IAEA was subsequently denied inspector access to all three major sites. 200 kg of 60%-enriched uranium remained unaccounted for underground at Esfahan.

Iran

Launched retaliatory strikes on Israel and Al Udeid. Officials later called the June 2025 ceasefire a strategic error that enabled US-Israeli rearmament before 2026.

Israel

Declared a decisive success; Netanyahu named Operation Rising Lion publicly. Israel entered the 2026 war with depleted interceptor stocks as a result.

United States

Marked the first combat use of the GBU-57 MOP. The White House declared nuclear facilities "obliterated"; the DIA assessed damage as significant but disputed the "destroyed" characterisation.