Serbia and Greece's alliance to resist Bulgaria was actually planned during the London talks.
However, relying solely on Serbia and Greece, and Montenegro, which had expanded its territory slightly, could only achieve a balance in numbers with the Bulgarian army.
Given the combat capability of the Bulgarian army, it would not be difficult to defend the occupied land. This prompted both Serbia and Greece to consider attracting more allies to participate.
As for the strong countries in the Balkan Region besides the Balkan Alliance, Romania is the only one located in the northeastern part of the Balkan Peninsula apart from the powerful nations and Turkey they had just jointly defeated.
Romania is located to the northeast of Serbia and north of Bulgaria. Before the outbreak of the Balkan War, it was the largest and most populous country on the Balkan Peninsula, apart from the Ottoman Turkish Empire.
