Question: Who was allied with Bulgaria and Montenegro in the First Balkan War?
About the article "Balkan Wars", section "First Balkan War".

Candidate passages:
The Treaty of Bucharest (; ; ; ) was concluded on 10 August 1913, by the delegates of Bulgaria, Romania, Serbia, Montenegro and Greece.
The Treaty was concluded in the aftermath of the Second Balkan War and amended the previous Treaty of London, which ended the First Balkan War. 
Montenegro was also considered as one of the weakest nations in the Balkan Peninsula, but in recent years before the war, with support from Russia and Serbia, it had improved its military skills.
Even so, due to Montenegro being the smallest member of the League, it didn't have much influence on the Ottoman Empire.
Despite this, it was advantageous for Montenegro, because when the Ottoman Empire was trying to counter the actions of Serbia, Bulgaria and Greece, Montenegro had enough time to prepare.
Even so, before the war, most of the Montenegrin Army still depended on Serbia. 
In 1912, the Balkan League—consisting of Serbia, Montenegro, Greece and Bulgaria—had jointly declared war against the Ottoman Empire.
Montenegro mobilized its troops and prepared to attack the Ottoman forces in Albania directly to the south.
It also enlisted the support of Catholic Albanian tribes across the border who had been fighting the Turkish armies for centuries.
Catholic tribes from Northern Albania (Kastrati, together with Hoti and Grude) joined the forces of Kingdom of Montenegro.
Scutari had long been desired by Montenegro because it was its capital for 300 years during its first three ruling families. 
The Balkan League (, "Balkanski sŭyuz", "Balkaniki Symmachia", "Balkanski savez") was an alliance formed by a series of bilateral treaties concluded in 1912 between the Balkan states of Greece, Bulgaria, Serbia and Montenegro, and directed against the Ottoman Empire, which at the time still controlled much of the Balkan peninsula.
The Balkans had been in a state of turmoil since the early 1900s, with years of guerrilla warfare in Macedonia followed by the Young Turk Revolution and the protracted Bosnian Crisis.
The outbreak of the Italo-Turkish War in 1911 had further weakened the Ottomans and emboldened the Balkan states.
Under Russian influence, Serbia and Bulgaria settled their differences and signed an alliance, originally directed against Austria-Hungary on 13 March 1912, but by adding a secret chapter to it essentially redirected the alliance against the Ottoman Empire.
Serbia then signed a mutual alliance with Montenegro, while Bulgaria did the same with Greece.
The League was victorious in the First Balkan War which broke out in October 1912, where it successfully wrestled control of almost all European Ottoman territories.
Following this victory however, the old differences between the allies re-emerged over the division of the spoils, particularly Macedonia, leading to the effective break-up of the League, and soon after, on 16 June 1913, Bulgaria attacked her erstwhile allies, beginning the Second Balkan War. 
The peace settlement of the First Balkan War proved unsatisfactory for both Serbia and Bulgaria.
Serbia refused to cede a part of the territories in Macedonia, which it occupied and promised to give to Bulgaria according to a secret agreement.
Serbia, on its side, was not satisfied with the independence of Albania, and sought a secret alliance with Greece.
Armed skirmishes between Serbian and Bulgarian troops occurred.
On 16 June 1913, just a few months after the end of the first war, the Bulgarian government ordered an attack on Serbian and Greek positions in Macedonia, without declaring war.
Almost all of Bulgaria's 500,000-man standing army was positioned against these two countries, on two fronts – western and southern, while the borders with Romania and the Ottoman Empire were left almost unguarded.
Montenegro sent a 12,000-strong force to assist the Serbs.
Exhausted from the previous war, which took the highest toll on Bulgaria, the Bulgarian army soon turned on the defensive.
Romania attacked from the north and north-east, the Ottoman empire also intervened in Thrace.
Allied numerical superiority was almost 2:1.
After a month and two days of fighting, the war ended as a moral disaster for Bulgaria, in the same time its economy was ruined and the military – demoralized.