The capital of Switzerland during World War 1 was the same as it is now, Bern.
Tokyo was the capital.
Berlin
Berlin
London
Canberra
tiriana
Athens
Canberra
The capital city of the Ottoman Empire during the First World War was Constantinople.
During World War II, the capital of Germany, an Axis power, was Berlin. Italy, another Axis power, had its capital in Rome. Japan, the third major Axis power, had its capital in Tokyo. These cities were central to their respective governments and war efforts during the conflict.
Berlin. (Bonn was the capital of West Germany, 1949-1990.)
Then, as now, Sofia.