The Protocol That Disarmed Ukraine
On May 23, 1992, Ukraine, Belarus, and Kazakhstan signed the Lisbon Protocol, giving up the Soviet nuclear arsenal. What did they receive in return?
On May 23, 1992, Ukraine signed away the world’s third-largest nuclear arsenal. In return, Ukraine received certain assurances, but it also faced significant losses.
On May 23, 1992, in the Portuguese capital, five states sat down to sign a document that would quietly reshape the post-Cold War order.
The Lisbon Protocol, an addendum to the 1991 Strategic Arms Reduction Treaty, committed Ukraine, Belarus, and Kazakhstan to return all inherited Soviet nuclear weapons to Russia and to accede to the Nuclear Non-Proliferation Treaty (NPT) as non-nuclear states. In exchange, they would receive security assurances and financial assistance for dismantlement.
When the Soviet Union dissolved in 1991, Ukraine found itself in physical possession of approximately 1,900 strategic warheads, 176 intercontinental ballistic missiles, and 44 strategic bombers, which made them the third-largest nuclear arsenal on the planet, behind only the United States and Russia.
Belarus and Kazakhstan held significant arsenals of their own. Across all three republics, the total inherited Soviet stockpile numbered roughly 5,000 weapons, including SS-18 ICBMs each capable of delivering ten independently targeted warheads.
But there is a distinction that the protocol’s popular history consistently ignores: Ukraine never controlled these weapons.
Operational launch authority, the actual codes and the command-and-control infrastructure, had remained in Russian hands from the moment the USSR ceased to exist. [NOTE: My article below deals with the concept of the “Dead Hand” or Permiter sytem. —JBM]
What Ukraine possessed was physical custody, not a functional nuclear deterrent. Senior Ukrainian officials understood the situation perfectly. One told American negotiators directly, “Ukraine is the France of the East; France has nuclear weapons, and so should we.”
What happened next, in Lisbon, in Washington, and ultimately in Budapest two years later, is a case study in how great-power diplomacy works and for whom.
