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Ukraine, Nuclear Weapons, and Security Assurances at a Glance

Last Reviewed
March 2022

Contact: Daryl G. Kimball, Executive Director, (202) 463-8270 x107

At the time of Ukraine’s independence from the Soviet Union in 1991, Ukraine held the third largest nuclear arsenal in the world, including an estimated 1,900 strategic warheads, 176 intercontinental ballistic missiles (ICBMs), and 44 strategic bombers. By 1996, Ukraine had returned all of its nuclear warheads to Russia in exchange for economic aid and security assurances, and in December 1994, Ukraine became a non-nuclear weapon state-party to the 1968 nuclear Nonproliferation Treaty (NPT). The last strategic nuclear delivery vehicle in Ukraine was eliminated in 2001 under the 1991 Strategic Arms Reduction Treaty (START). It took years of political maneuvering and diplomatic work, starting with the Lisbon Protocol in 1992, to remove the weapons and nuclear infrastructure from Ukraine.

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1994 Trilateral Statement

The Massandra Accords set the stage for the ultimately successful trilateral talks. As the United States mediated between Russia and Ukraine, the three countries signed the Trilateral Statement on January 14, 1994. Ukraine committed to full disarmament, including strategic weapons, in exchange for economic support and security assurances from the United States and Russia. Ukraine agreed to transfer its nuclear warheads to Russia and accepted U.S. assistance in dismantling missiles, bombers, and nuclear infrastructure. Ukraine’s warheads would be dismantled in Russia, and Ukraine would receive compensation for the commercial value of the highly enriched uranium. Ukraine ratified START on February 3, 1994, repealing its earlier preconditions, but it would not accede to the NPT without further security assurances.

https://www.armscontrol.org/factsheets/ukraine-nuclear-weapons-and-security-assurances-glance