We tend to think of borders as immutable lines on the map, but as allegiances change, wars come and go, empires fall, and these dividing lines between nations can wander all over the place.

Today, the ever more isolated exclave hosts nuclear-capable Iskander missiles and much of the Russian Baltic fleet. Following Moscow's war on Ukraine, the EU started restricting overland access to ...

WSJ explains why the exclave, which has been at the center of escalating tensions amid the Ukraine war, is so important for Moscow. Photos: Reuters/Sputnik Some days the high-speed news cycle can ...

Russia, which borders Lithuania and Poland through its small exclave of Kaliningrad, signed a bilateral agreement with Lithuania in 2001 that allowed free access for military inspectors.