Final answer:
The two Central Powers that lost the least amount of territory following WW1 were Bulgaria and the Ottoman Empire.
Step-by-step explanation:
The two Central Powers that lost the least amount of territory following World War I were Bulgaria and the Ottoman Empire. This is because, while Germany and Austria-Hungary suffered significant territorial losses, the Ottoman Empire was carved up under the various mandates controlled by France and Great Britain, yet the core region of Turkey achieved independence under Mustafa Kemal Ataturk. Bulgaria also lost territories but on a lesser scale compared to the major Central powers like Germany and Austria-Hungary. On the other hand, Germany lost 13 percent of its territory in Europe, ceding land to France, Belgium, Poland, Lithuania, and the formation of Czechoslovakia, in addition to all of its overseas colonies.