Poland and Lithuania are strengthening defenses of the Suwałki Corridor, a narrow strip of land between the two countries that NATO planners fear Russia could swiftly cut, isolating the Baltic states from Western allies. Glen E. Howard and Ray Wojcik of The National Interest report that the two countries are boosting military cooperation by developing a joint cross‑border training area and enhancing interoperability, infrastructure, and rapid troop mobility.
Lithuania has committed significant funding for a new brigade‑sized training ground, and Poland is expanding its defense forces and strategy to fortify its northern and eastern borders. Their efforts align with broader NATO deterrence plans and include exercises, improved logistics, and integration under modern concepts like Joint All‑Domain Operations, aiming to turn a historic vulnerability into a strengthened defense hub. They write:
On January 25, 2026, during a trilateral meeting in Vilnius with Polish president Karol Nawrocki and Ukrainian president Volodymyr Zelensky, Lithuanian president Gitanas Nausėda unveiled a proposal to significantly enhance security in the highly vulnerable Suwalki Corridor.
The Suwalki Corridor, or Suwalki Gap, is the narrow strip of land along the border between Poland and Lithuania. Often described as the “Achilles heel” of NATO’s eastern front, the corridor is threatened by Russian forces in Kaliningrad on the Baltic coast and Russian forces operating within Belarus joining together to sever the land access between Poland, Lithuania, and the other Baltic states
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