Was Bulgaria the only country that gained territory after losing war? - Quora
USSR joined the Axis powers by D-Okhapkin on DeviantArt
Hungary's Place in German South-East European Policy, 1919–1944
Axis Powers Worksheets & Facts | Background, The Pact of Steel
Axis Alliance in World War II | Holocaust Encyclopedia
A World in which Bulgaria switched sides to the Allies in WW2 before being invaded by the Soviets : r/imaginarymaps
Concise History of Bulgaria - ConnollyCove
World War II in Yugoslavia - Wikipedia
Managed to get Greater Greece, repulse the Axis, personally marched into Berlin. And what's my reward? When Bulgaria and Germany join the Allies, they automatically take my clay.... Nice reward. : r/hoi4
Circumstances Leading to Formation of Triple Alliance and Triple Entente | Diplomatist
Why did Bulgaria join the axis? (Short Animated Documentary) - YouTube