Russia and Iran Activate 20-Year Strategic Partnership Treaty

The Comprehensive Strategic Partnership Treaty between Russia and Iran officially entered into force on October 2, 2025. Signed by Vladimir Putin and Masoud Pezeshkian in Moscow on January 17, 2025, the 20-year agreement replaces a 2001 treaty and establishes a legal framework for long-term cooperation in defense, energy, finance, agriculture, and technology.

Both nations pledged to mitigate the effects of international sanctions, which they characterized as illegal, and agreed not to support any aggressor attacking the other party. Key initiatives include the development of independent defense infrastructure and a planned gas pipeline via Azerbaijan. The pact also coincides with a separate agreement between Rosatom and the Atomic Energy Organization of Iran to construct eight small nuclear power plants to help Iran reach a 20-gigawatt capacity by 2040.

As the treaty took effect, Russia reinforced its diplomatic support for Tehran. On September 29, Vasily Nebenzia, Russia's Permanent Representative to the United Nations, issued a letter rejecting a UN Security Council vote to reimpose sanctions against Iran via the snapback mechanism, asserting that such measures lack a legal basis.