To become stronger. Austria had industrial strengths, while Hungary had agricultural strengths. However, they split after WWI.
Archduke Franz Ferdinand was heir just before the war started, but his assination was the cause of the war itself. His successor was Archduke Otto, but in 1916, two years before the end of the war,...
the central powers
Austira-Hungary used to be a country, but divided into two separate countries after World War I.
Central Powers... at least if you're doing nova net like me