The 1997 Treaty in Which Russia Recognized Ukraine's Borders
By 1997, Russia had recognized Ukraine several times, yet arguments over Crimea, Sevastopol, and the Soviet military inheritance still unsettled the relationship. The two governments tried to close that chapter with a sweeping treaty built around one basic promise: each would respect the other's borders.
A “Big Treaty” Between Neighbors
Presidents Leonid Kuchma and Boris Yeltsin signed the Treaty on Friendship, Cooperation and Partnership in Kyiv on May 31, 1997. Often called the Big Treaty, it entered into force in April 1999 after both countries completed ratification.
The timing mattered. Days earlier, agreements had divided the former Soviet Black Sea Fleet and regulated Russia's bases in Crimea, removing the largest obstacle to a broader political settlement.
The friendship treaty was meant to define a stable relationship between two sovereign states, not a temporary arrangement while the Soviet breakup was reconsidered. It covered economic cooperation, minority rights, culture, environmental protection, security, and regular consultation.
What Russia Agreed To
The treaty's central provisions were unusually direct. Russia and Ukraine promised to build relations on mutual respect for sovereign equality, peaceful settlement of disputes, non-use of force, and non-interference in internal affairs.
Most importantly, Article 2 said the parties would respect each other's territorial integrity and confirmed the inviolability of the borders existing between them. That included Crimea and Sevastopol because both lay within Ukraine's recognized post-Soviet boundary.
The countries also pledged not to let their territory be used to damage the other's security. They rejected supporting actions aimed against the other state and committed themselves to consultation when a situation threatened peace or their vital interests.
These were reciprocal duties, not a concession made only by Russia. Yet Russia's recognition was especially important because prominent figures in Moscow had questioned whether Ukraine should control Crimea or the fleet's historic home port.
Why the Treaty Seemed to Settle the Question
The agreement ran for ten years and renewed automatically unless one side gave notice. Together with the fleet settlement and later accords defining the land border, it appeared to replace the uncertainty of the early 1990s with a conventional neighbor-to-neighbor relationship.
Neither parliament ratified it instantly, and political objections remained in both capitals. Its eventual entry into force was therefore a deliberate confirmation, not an unnoticed relic of the Soviet breakup.
Ukraine remained outside both NATO and Russia's military alliance. It traded heavily with Russia while also expanding ties with Europe, a balancing policy that looked workable when Moscow officially accepted the rules of sovereign equality.
The Ukrainian parliament's ratification record summarized the promise plainly: territorial integrity and the inviolability of existing borders were fundamental principles of the relationship.
The Contrast With 2014
Russia's occupation and claimed annexation of Crimea in 2014 breached precisely those provisions. Support for armed groups and direct Russian military intervention in eastern Ukraine also contradicted the treaty's rules on force, interference, and using territory against the other state.
Ukraine chose not to renew the treaty in 2018, and it expired the following year. Its end did not retroactively erase the commitments or transfer any territory; it marked the collapse of a framework Russia had already violated.
For a time, though, the treaty encouraged the belief that the border question was settled. A smaller confrontation in the Kerch Strait at Tuzla Island in 2003 showed how fragile that belief was.
Russia's Black Sea Fleet and Sevastopol
Tuzla 2003: An Early Territorial Confrontation With Russia