To defend against Russian aggression Eastern Europe is considering a “drone wall.” The idea is to use sensors, drones, and ...

800km of walls and fences either built or under construction on Europe’s borders. That is the equivalent of almost 12 new Berlin Walls, according to our analysis of publicly available documents.

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.