Nakhchivan represents an “Achilles Heel” for both Armenia and Azerbaijan. And the dynamic security environment around this exclave turns the region into a potential “powder keg” where a new stage of fighting could erupt. Therefore, the Organization for Security and Cooperation in Europe’s (OSCE) Minsk Group—charged with resolving Armenia and Azerbaijan’s standoff over Karabakh—should not lose sight of the two countries’ mounting tensions over the frequently overlooked Nakhchivan.