Yes, on the side of the central powers.
15 October 1915 - 29 September 1918
Yes. Bulgaria joined the Central Powers to fight Serbia.
The leader of the Government: Vassil Radev engaged Bulgaria to join the World War I
the bulls
after its end
October 14, 1915
Then, as now, Sofia.
March 1, 1941.
Radoslavov
joined Germany
Germany, Austria, Turkey
having alliances involved more nations in world war I Germany got in because it was an ally of Bulgaria. France and Britain got in because they were both allies with sebiria