The Lublin Triangle (Lithuanian: Liublino trikampis; Polish: Trójkąt Lubelski; Ukrainian: Люблінський трикутник, romanized: Liublinskyi trykutnyk) is a regional alliance of three European countries – Lithuania, Poland, and Ukraine[3] – for the purposes of strengthening mutual military, cultural, economic and political cooperation and supporting Ukraine's integration into the European Union and NATO.

During the Economic Forum in Karpacz, Poland, on 10 September 2020, Jan Hofmokl, Director of the Eastern Department of the Polish Foreign Ministry, stated that the Lublin Triangle should in fact be a square with Belarus.

[9] On 17 September 2020 the first meeting (in the format of a video conference) of the national coordinators of the Lublin Triangle, created by the Foreign Ministers of Ukraine, Poland and Lithuania in July 2020, took place.

Vasyl Bodnar (Ukraine), Marcin Przydacz (Poland) and Dalius Čekuolis (Lithuania), Deputy Foreign Ministers, have been appointed coordinators of this tripartite cooperation mechanism.

Today, primarily as a result of Russia's aggressive actions, it is increasingly difficult for major alliances to maintain international peace and security.

[13] On 2 December 2021 the presidents of the Lublin Triangle held the first joint talks and adopted a statement calling on the international community to strengthen sanctions against the Russian Federation due to its ongoing aggression against Ukraine.

The leaders agreed to work together to counter Russia's attempts to monopolize the European gas market and use energy as a geopolitical weapon.

The presidents also expressed mutual support amid the migration crisis on the EU's borders, artificially created by the Lukashenko regime.

[14] On the eve of the large-scale Russian invasion of Ukraine, on 23 February 2022, the heads of states of the Lublin Triangle met in Kyiv, where they signed a joint declaration.

It condemns the decision of the Russian Federation to recognize the temporarily occupied territories of Donetsk and Luhansk Oblasts as "independent", and also supports granting Ukraine the status of a candidate for EU membership.

[17][18] On 6 December 2022, during the EU - Ukraine Forum on Countering Disinformation held in Brussels, three non-governmental organisations from Lithuania, Poland, and Ukraine (the Civic Resilience Initiative, Kościuszko Institute and Detector Media respectively), presented a joint in-depth report highlighting the challenges resulting from Russian disinformation and propaganda activities in the Lublin Triangle countries.

[21] Polish President Andrzej Duda announced that Ukraine will receive a company of Leopard tanks as part of the creation of an international coalition.

President Duda emphasized “We are doing everything to make the Vilnius summit rich in decisions so that it causes improvement of the security in our part of Europe and a reliable perspective of Ukraine’s membership in the (North Atlantic) Alliance”.

[25] According to this Joint Declaration of Lithuania, Poland and Ukraine, the foreign ministers of the parties should hold regular meetings, in particular in the fields of multilateral activities, and with the participation of selected partners.

[26] During the first videoconference meeting on 17 September 2020, the national coordinators identified the main activities of the Lublin Triangle and agreed to ensure sustainable interaction of the format at different working levels.

The initiative is inspired by the study of the potential of youth cooperation under the auspices of the Lublin Triangle conducted by the Public Diplomacy Platform and funded by the Konrad Adenauer Stiftung.

Based on close historical and cultural ties between the member states, the Youth Lublin Triangle has been created to ensure synergy between young people and prepare them for life in a prosperous and safe single European space.