BERLIN—A dozen senior German officers convened at a triangle-shaped military compound in Berlin about 2½ years ago to work on a secret plan for a war with Russia. Now they’re racing to implement it.

The Second Schleswig War of 1864 was a pivotal conflict that ignited the flames of unity and reshaped Europe's destiny. Germany, divided and yearning for unification, saw in this clash an opportunity ...

Four years after Russia's full-scale invasion of Ukraine, Germany's economy has transformed, impacted by the effects of war. This week, we're taking stock of four years of all-out war in Ukraine and ...