Ukraine-Russia Treaties 1997–2010: The Legal Framework Russia Destroyed

Between 1997 and 2010 Ukraine and Russia concluded a series of bilateral agreements that appeared to lay a stable legal foundation for their relationship. These treaties recognised Ukrainian sovereignty, delineated borders, governed naval basing rights, and regulated energy flows. Russia violated or abrogated all of them after 2014. The dismantling of this treaty framework was not incidental to Russia's aggression but an essential part of it.

The Treaty of Friendship, Cooperation and Partnership (1997)

The Treaty of Friendship, Cooperation and Partnership between Ukraine and Russia, signed 31 May 1997 and ratified February 1999, was the foundational legal document of the bilateral relationship. Its Article 2 explicitly reaffirmed "mutual respect for state sovereignty and territorial integrity, the inviolability of borders." This was the clearest possible Russian legal recognition of Ukraine's sovereignty within its 1991 borders, including Crimea. The treaty also committed both parties to non-interference in each other's internal affairs and to refrain from supporting third parties in actions against either state. It was intended to run for ten years with automatic renewal — meaning it remained legally valid in 2014 and 2022 when Russia violated it. Russia announced it would not renew the treaty in September 2018, allowing it to lapse in April 2019 — effectively acknowledging that the 1997 legal framework was legally incompatible with its post-2014 actions.

The Kharkiv Accords and Black Sea Fleet

Separate from the Friendship Treaty but closely linked to the 1997 agreement were the arrangements governing Russia's Black Sea Fleet at Sevastopol in Crimea. The 1997 Kharkiv-Partition Accords divided the former Soviet Black Sea Fleet and allowed Russia to maintain up to 25,000 troops, 132 warships, 22 aircraft, and 11 shore installations at Sevastopol under a lease arrangement running until 2017. Ukraine received financial compensation and discounted gas prices in exchange. The 2010 Kharkiv Accords, signed under President Yanukovych and Prime Minister Putin in April 2010, extended the Russian basing rights by an additional 25 years (to 2042) in exchange for a further gas price discount — a deeply controversial arrangement that Ukrainian opposition parties called a "capitulation." The entire arrangement became moot when Russia annexed Crimea in 2014 and simply retained the base without a lease agreement.

Natural Gas Agreements

The Ukraine-Russia relationship was substantially mediated through natural gas. Ukraine was both a major consumer of Russian gas and the main transit route for Russian gas to Europe — carrying approximately 80% of Russian gas exports to Europe in the early 2000s. A series of bilateral agreements, renegotiated repeatedly, governed both the price Ukraine paid for Russian gas and the transit fees Gazprom paid for crossing Ukrainian territory. These agreements were politically fraught from the beginning. Russia used gas pricing as leverage — offering discounted prices to governments it favoured and abruptly ending them as punishment for political orientation changes. This dynamic produced the 2006 and 2009 gas crises when Russia cut supplies to Ukraine in January of each year, interrupting gas flows to European countries in winter and generating enormous pressure on Ukraine to accept Russia's terms.

The Pattern of Abrogation

The systematic dismantling of the bilateral treaty framework reveals the premeditated nature of Russia's aggression. Each treaty violated was a legal instrument in which Russia had explicitly recognised what it later denied: Ukraine's territorial integrity, sovereign rights over Crimea, and legal jurisdiction over territories Russia later occupied. The 1997 Friendship Treaty's Article 2 made Russia's 2014 annexation of Crimea prima facie a treaty violation. The Black Sea Fleet lease agreements presupposed that Sevastopol was Ukrainian territory — as it legally remains under international law — making annexation a direct repudiation of Russia's own contractual obligations. Ukraine brought inter-state arbitration proceedings under the Vienna Convention on the Law of Treaties. Russia's abrogation pattern also illustrates the futility of bilateral agreements with an actor that treats international commitments as tactical tools rather than binding obligations.

Implications for Future Agreements

Russia's systematic violation of its bilateral treaty obligations with Ukraine has profound implications for any future peace settlement. Russia has demonstrated that it regards its treaty commitments as contingent on political advantage rather than binding in international law. Any agreement between Ukraine and Russia — whether ceasefire, peace treaty, or any form of normalisation — will face credibility deficits precisely because Russia has abrogated any serious bilateral commitment it has made to Ukraine. Ukrainian officials, the EU, and the United States have consistently argued that any future security arrangements for Ukraine must therefore rest on legally binding multilateral guarantees from credible third parties, rather than on bilateral Russian assurances. The lesson of 1997–2014 is that paper agreements with Moscow are insufficient without enforcement mechanisms.

FAQ

Did Russia's 1997 Friendship Treaty explicitly recognise Crimea as Ukrainian?

Yes. Article 2 stated both parties "respect each other's territorial integrity and confirm the inviolability of the borders existing between them." Since Crimea was within Ukrainian borders at the time, Russia explicitly recognised its Ukrainian status — making the 2014 annexation a direct treaty violation.

Why did Ukraine agree to the 2010 Kharkiv Accords extending the fleet lease?

President Yanukovych, who had close ties to Moscow, agreed to the extension primarily in exchange for a gas price discount that reduced Ukraine's energy import costs. Critics argued this was short-sighted geopolitically and unconstitutional. The Constitutional Court of Ukraine controversially upheld the agreement.

Did the Friendship Treaty require Russia to defend Ukraine if attacked?

No. The treaty did not contain mutual defence obligations. It primarily committed both parties to respecting sovereignty and non-interference. It created legal obligations not to attack Ukraine, which Russia violated — but it did not obligate Russia to defend Ukraine against other threats.

What happened to the gas transit agreements after 2014?

Gas relations became increasingly adversarial after 2014. Naftogaz (Ukraine) won a major arbitration against Gazprom (Russia) in 2017. A new transit agreement was concluded for 2020–2024. Russia's transit through Ukraine effectively ended in 2024 when Ukraine declined to renew, having developed alternative routes and reduced gas dependence.

Can the 1997 Friendship Treaty be used in international legal proceedings?

Ukraine has cited it in constructing its legal case against Russia. However, since Russia has allowed it to lapse and refuses to recognise Ukrainian jurisdiction over the issues, the treaty's direct enforceability is limited. Its significance is primarily evidential — demonstrating Russia's prior recognition of Ukrainian territorial integrity.

Sources

1. Molchanov, Mikhail. Political Culture and National Identity in Russian-Ukrainian Relations. Texas A&M University Press, 2002.
2. Charap, Samuel and Timothy Colton. Everyone Loses: The Ukraine Crisis. IISS/Routledge, 2017.
3. Treaty of Friendship, Cooperation and Partnership between Ukraine and Russia. 31 May 1997. Full text, UNTS.
4. Kuzio, Taras. Ukraine: State and Nation Building. Routledge, 1998.
5. Balmaceda, Margarita. The Politics of Energy Dependency: Ukraine, Belarus, and Lithuania between Domestic Oligarchs and Russian Pressure. University of Toronto Press, 2013.