World War I involved 32 nations from 1914 to 1919. It redrew the world map and reshaped many borders in Europe. The collapse of the Russian Empire created Poland, the Baltics, and Finland.

Bulgaria and Romania are holding ceremonies to mark their full membership in Europe’s Schengen area, the culmination of years ...

The European Commission will allocate $180 million to six countries to protect their borders with Russia and Belarus.

"The water doesn't recognise national borders – rivers are often transboundary," Jackson says. "This is true in Europe ... on sea lions' backs to help them map the elusive ocean floor.