I believe it was the Allied Powers. I've been trying to find the anwer to this question as well, and I've found that everything just says that the bulgarians were defeated in this war. The bulgarians (Germans) were of the Axis Powers. So, the Allied Powers must have won.
Axis
Axis Powers / Allied Powers .
The Allied Powers, Axis powers, and the Neutral Powers
The main axis powers at the begining of the war were Italy, Germany, and Japan. The allied powers were Britian, France, Russia, and the US.
During World War II, the Balkans were not in fact at the center of the conflict between European powers. While all of the Balkan nations became embroiled in the war, whether as Axis or Allied associates, this theater remained subsidiary (if also important for its material resources and drain on Axis manpower) from start to finish.
World War 2
The Allied Powers were victorious. The Axis Powers were defeated.
The Allied Powers, and the Axis Powers.
The Soviet Union (who began on the side of the Axis Powers then later joined the Allied Powers after Hitler launched an attack on her) The United States (Allied Powers) Great Britain (Allied Powers) Germany (Axis Powers) Japan (Axis Powers) Italy (Axis Powers) France was also involved as one of the Allied Powers but ended up not being much of a great power after she was overtaken and occupied by Germany near the beginning of the war.
The Allies and the Axis were the two sides who fought each other in the war
The Axis powers and the Allied powers.
In World War 1 Allied Powers, and in World War 2 Axis