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Ukraine, Poland, and Lithuania create “Lublin Triangle,” stirring memories of 17th century republic

Ministers of Foreign Affairs of Lithuania, Poland, and Ukraine, Linas Linkevičius, Jacek Czaputowicz, and Dmytro Kuleba on July 28, 2020 announcing the creation of a new regional security cooperation grouping, the Lublin Triangle, both to counter Russian aggression and promote the continued expansion of Europe. (Source: MFA of Ukraine website)
Ministers of Foreign Affairs of Lithuania, Poland, and Ukraine, Linas Linkevičius, Jacek Czaputowicz, and Dmytro Kuleba on July 28, 2020 announcing the creation of a new regional security cooperation grouping, the Lublin Triangle, both to counter Russian aggression and promote the continued expansion of Europe. (Source: MFA of Ukraine website)
Ukraine, Poland, and Lithuania create “Lublin Triangle,” stirring memories of 17th century republic

On 28 July in the Polish city of Lublin, the Foreign Ministers of Ukraine, Poland, and Lithuania, Dmytro Kuleba, Jacek Czaputowicz, and Linas Linkevičius, announced the creation of a new international collaboration format called the “Lublin Triangle.” Its creation stirs memories of the Polish-Lithuanian Commonwealth, a bi-federation that in the 16-17th centuries was one of the largest and most populous in Europe.

“Today we are creating the Lublin Triangle, a format that will be an important element in the development and strengthening of Central Europe, but also in strengthening Ukraine as a full member of the European and Euro-Atlantic family,”Kuleba said at a joint press conference.

Cooperation between the three countries will not be limited to defense issues, such as the joint LitPolUkrbrig brigade active since 2014, but will also include strengthening economic cooperation, trade, and tourism. According to an announcement on the website of the Ukrainian MFA, the new tripartite format is based on the traditions and historical ties of the three countries, whose roots go back to many centuries and is an important mechanism for strengthening Central Europe and promoting Ukraine’s European and Euroatlantic integration.

“Ukraine constantly tries to join some existing formats – the Visegrad Four, the Bucharest Nine, the Three Seas, the EU and NATO. But I believe that Ukraine should not only aspire to join something already created by somebody but be creative ourselves, engage in central European affairs… This is yet another step of Ukraine to Europe, a return into the European family of nations,” Kuleba said in a video address on his Facebook page.

He added that joint efforts to fight Russian disinformation and advocacy of Ukraine’s Euro-Atlantic perspectives could be among the first projects of the cooperation.

Additionally, the participants in the format agreed to coordinate actions to protect international law in the context of Russia’s ongoing aggression against Ukraine both in tripartite coordination and in international organizations: NATO, the UN, the EU, the Council of Europe, and the OSCE; as well, trade, investment, and infrastructure projects will be developed, according to a statement published by the MFA.

A joint declaration on the creation of the Lublin triangle stressed the importance of intensifying the cooperation between the EU, NATO, and the Eastern Partnership and paying special attention to the development of the Three Seas Initiative. The countries of the format support Ukraine’s cooperation with the Three Seas and other regional formats of cooperation.

Among other priorities named in the declaration is support for Ukraine’s territorial integrity and aspirations to NATO membership, the next step towards which should be providing Ukraine with a NATO Membership Action Plan.


This is the first central European alliance that Ukraine has become a part of. Other Central European regional cooperation initiatives include:

The Visegrad Four – a cultural and political alliance of EU and NATO members Czech Republic, Hungary, Poland, and Slovakia for the purposes of advancing military, cultural, economic and energy cooperation with one another along with furthering their integration in the EU.

The Bucharest Nine brings together nine countries of the NATO Eastern flank –  Poland, Bulgaria, the Czech Republic, Estonia, Hungary, Latvia, Lithuania, Romania, and Slovakia. The B9 format was launched in 2015 in response to the Russian aggression in Ukraine in 2014. Regular meetings held at various levels aim to highlight the defense and deterrence needs of the NATO Eastern flank countries and to discuss pressing matters of their security policy.

The Three Seas initiative is a forum of twelve EU states along a north-south axis from the Baltic Sea to the Adriatic Sea and the Black Sea in Central and Eastern Europe. The Initiative aims to create an intermarium-based regional dialogue on various questions affecting the member states.

Memories of the Polish-Lithuanian Commonwealth

From left to right: Dmytro Bratishko, commander of the LitPolUkr brigade, Ministers of Foreign Affairs of Poland, Ukraine, and Lithuania Jacek Czaputowicz, Dmytro Kuleba, and Linas Linkevičius. In the background is a portrait of Kostiantyn Ostrozhskyi. Source: Dmytro Kuleba’s FB page

The alliance of our three countries is not only rooted in antiquity. Our interaction has the dimension of the Parliamentary Assembly Poland-Lithuania-Ukraine, as well as a joint military unit, the Ukrainian-Polish-Lithuanian Brigade. The Lublin Triangle is based on this historical, parliamentary, and security foundation,” Dmytro Kuleba commented.

Ukraine’s Foreign Minister is referring to the Polish-Lithuanian Commonwealth, one of the most populous and largest European states of the 16-17th centuries.

After the medieval kingdom of Kyivan Rus fell under the attacks of the Tatar-Mogol hordes, the territory of modern Ukraine was drawn into the Grand Duchy of Lithuania, which in 1569 united with the Crown of the Kingdom of Poland in Lublin (the very city where the “Lublin Triangle” was formed), forming the Polish–Lithuanian Commonwealth, an elective monarchy which scholars sometimes term “a composite republic of the nobles.” It lasted until 1795, collapsing with the Third Partition of Poland.

The Polish-Lithuanian Commonwealth at its maximum extent during 1619. Image: Wikipedia

Its Golden Age was in the early 17th century, where the bi-federation was able to hold its own against Sweden, the Tsardom of Russia, and vassals of the Ottoman Empire, and even launched successful expansionist offensives against its neighbors. Coincidentally, its power began waning after a rebellion of Ukrainian Kozaks led by hetman Bohdan Khmelnytskyi, who asked the Russian Tsar for protection in the Treaty of Pereyaslav of 1654. The Russian annexation of a part of Ukraine supplanted Polish influence and determined Ukraine’s history for centuries to come. 

Curiously enough, the Polish-Lithuanian Commonwealth was responsible for the first mention of the toponym of Ukraine on a geographical map. Polish cartographer Tomasz Makowski was creating a map of the Grand Duchy of Lithuania in the 1590s showing the new border between the Duchy and the Polish Crown. Ukraine is also mentioned there as “Volynia Vlteririor quae tum Vkraina tum Nis ab altis vocitatur” (East Volyn which was also called Ukraine and the lowland).

In his book “Ukraine, the Gates of Europe,” historian Serhii Plokhy tells that Makowski received the information for this map from Kostiantyn Vasyl Ostrogski, a Ukrainian (Ruthenian) prince and Orthodox nobleman and statesman who represented Rus-Ukraine during the Union of Lublin in 1569. The treaty contains his signature, and perhaps that is the reason he is part of the group photo above, symbolically present at the signing of a new Union at Lublin.

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