Germany, Bulgaria and the Ottoman Empire.
They were:GermanyThe Ottoman EmpireHungaryBulgaria
Joined the Allies.
Germany and Ottoman Turkey
Germany and Italy
Germany, Italy, Japan and Hungary/Austria.
Germany, Bulgaria, and the Ottoman Empire.
Austria-Hungary and Bulgaria were Germany's allies.
Germany was in an alliance with Austria-Hungary and Italy.
Germany,Austria,Hungry and the allies .
Austria. They had been allies in WW1, but the Treaty of Versailles forbade their union after World War I.
If you mean who Germany's allies were. Japan, Austria, and spain were their biggest allies.