# JCPOA The Joint Comprehensive Plan of Action (JCPOA), reached in July 2015 between Iran and the P5+1 (the United States, United Kingdom, France, Russia, China, and Germany, plus the EU), traded sanctions relief for strict, internationally verified limits on Iran's nuclear program. It was the signal nuclear-diplomacy achievement of its era — and its unraveling is the backdrop to the [[Iran War 2026]]. ## The Terms Under the deal, Iran agreed to cap uranium enrichment at 3.67% (far below weapons grade), slash its stockpile of enriched uranium by roughly 98%, reduce its installed centrifuges by about two-thirds, redesign its Arak heavy-water reactor so it could not produce weapons-grade plutonium, and submit to the most intrusive inspection regime the International Atomic Energy Agency had ever implemented. In exchange, Iran received relief from nuclear-related US, EU, and UN sanctions. The agreement was negotiated for Iran under reformist President [[Hassan Rouhani]] and for the US under the Obama administration. ## Destruction and Aftermath Negotiated under President [[Barack Obama]], the deal was bitterly opposed by Israeli Prime Minister [[Benjamin Netanyahu]] and by US hawks who argued it was too narrow and time-limited. In May 2018 [[Donald Trump]] withdrew the United States and reimposed sanctions under the banner of [[Maximum Pressure]] — over the objections of the other signatories, who judged Iran to be in compliance. Freed from constraints, Iran progressively abandoned its commitments, enriching uranium to 60% and accumulating a stockpile that put it within reach of weapons-grade material. Repeated efforts to revive the agreement failed, and the collapse of the diplomatic track helped clear the path to war. ## Why It Matters For the vault, the JCPOA is the central exhibit in the debate over whether Iran's nuclear ambitions are best contained by diplomacy or by force. Its supporters cite it as proof that verified arms control worked — Iran's program was demonstrably frozen and inspected — and its destruction as a self-inflicted wound that produced the very breakout it was meant to prevent. Its right-wing opponents cast it as appeasement. The deal's life and death map directly onto the realignment fault line over Iran: the diplomacy-vs-confrontation split that runs through [[Maximum Pressure]] and the [[Iran War 2026]]. *See also: [[Iranian History Hub]], [[Maximum Pressure]], [[Hassan Rouhani]], [[Iran War 2026]]* ## See also - [[Nuclear Security]] — securing fissile material and the black-market threat