The winter of 1912-13, after the conclusion of the armistice, was spent in futile negotiations for peace at a Conference in London. The main cause of failure was Adrianople. The Bulgarians insisted on its cession to them as a condition of permanent peace. The Porte, in the first instance, was not unwilling to give way on this. But a military émeute occurred at Constantinople. A deputation from the army, headed by Enver Bey, insisted on entering the chamber where the Council of Ministers were deliberating on the question, with the object of protesting against the surrender of the stronghold. Nazim Pasha, the Minister of War, and his aide-de-camp were killed in the endeavour to resist this inroad. The Grand Vizier was thereupon terrorized into resignation. In his place Mahmoud Shefket, who had proved to be so loyal to the Young Turks at the early stage of their movement, was appointed. He refused to surrender Adrianople. The negotiations in London were broken off.

Early in 1913, on January 4th, the Bulgarians gave notice of the termination of the armistice. War was renewed. On February 4th the Bulgarian army commenced an attack on Adrianople, supported on this occasion by fifty thousand Serbians. On the same day they fought a battle near Bulair, defeated the Turks, and captured that important fortress, threatening the command of the Dardanelles. The Greeks also renewed the war. They sent an army into Epirus and, on March 6th, captured Janina, making prisoners thirty-three thousand Turks and seizing immense stores of guns and ammunition. On the 10th of the same month their fleet captured the island of Samos.

On March 28th the Bulgarians captured Adrianople and its garrison of twenty thousand Ottomans, and on April 21st the Montenegrins succeeded in getting possession of Scutari, which they claimed as the capital of their State. After these serious reverses the Porte was desirous of coming to terms, and was willing even to cede Adrianople and almost the whole of Thrace. It invited the mediation of the Great Powers. The allied States agreed to this. A second Conference was held in London on the basis that the Porte was to give up all its possessions in Europe, save the small part of Thrace south of a line drawn from Enos, in the Ægean Sea, to Media, in the Black Sea, a few miles north of the Tchatalja lines. Crete was to be ceded to Greece, and the destination of the islands in the Ægean Sea lately in the possession of Turkey, and some of which were necessary for its defence, was to be left to the decision of the Powers. A treaty was effected between the Porte and the Powers to this effect. But there was far greater difficulty in determining how the ceded districts were to be divided between the victorious Balkan States. The position was aggravated by Roumania coming into the field and claiming compensation in territory, in consideration of the important changes impending in the balance of power in the Balkans.

The four States so lately in alliance against the common enemy, Turkey, were now madly jealous of one another in the division of the spoils. Serbia, which had contributed so largely to the result by the splendid valour of its army against the main body of Turks under Zeki Pasha, was not content with the small slice of Macedonia which it had agreed to in the treaty with Bulgaria in 1912, before the war. The decision of the Powers that Albania was to be an independent State deprived Serbia of the much-hoped-for access to the Adriatic. The acquisition by Bulgaria of Thrace, including Adrianople, would greatly alter the balance of power in the Balkans to the disadvantage of Serbia and justified its claim to a larger share of Macedonia. It was already in occupation of nearly half of that province. Bulgaria was equally ambitious to revive the big Bulgaria of the San Stefano treaty, and could also appeal to long past history in favour of it. It was determined to get possession of Salonika, and was madly jealous of Greece. The Greeks, on their part, were in possession of that city and of the southern half of Macedonia. They had got hold of these districts by force of arms and were determined not to give them up. No agreement could be come to in London. Russia in vain did its utmost to compose these differences. It offered to act as arbitrator and invited the Balkan States to send representatives to Petrograd to settle the questions.

We now know that the Bulgarian Government had no intention whatever to make concessions to the other Balkan States. The pacific section of its ministers were overborne by the more bellicose members. M. Gueshoff, the able Premier, who had been responsible for the policy which preceded the war, and who was now in favour of a peaceful settlement, was compelled to resign. King Ferdinand, a most unscrupulous and ambitious intriguer, backed up the war party, and was mainly responsible for the treacherous policy pursued, which was fraught with so much misfortune to his State. In spite of the warnings from Russia that, if force were resorted to, Bulgaria would find itself confronted by a Roumanian army, and that the Porte would also join in the war against it, King Ferdinand and his Government decided on war with their late allies. They had unbounded and arrogant confidence in their army, and despised those of Greece and Serbia.

On June 29, 1913, at midnight, the Bulgarian army in Macedonia made a sudden and unprovoked attack on the Greek and Serbian outposts, without any warning or declaration of war. This treacherous action was followed up the next day by an advance of the Bulgarian army of a hundred thousand men on the right flank against the Serbian army, which was nearest to them. For the moment this seemed to promise success, and the Serbians were compelled to fall back. But on July 1st the Serbians, whose forces, supported by the Montenegrins, were almost equal in number to the Bulgarians opposed to them, rallied and decided on a counter offensive. On July 2nd they attacked the Bulgarians on the Bragalbabza River, defeated them, and captured many of their guns. On July 4th another battle took place with much the same result. Istib was captured on the 8th, and the Bulgarians were then compelled to retreat towards their own frontier.

Meanwhile the main army of the Greeks, which was concentrated at Salonika, a day’s march from the Bulgarians on the left flank, advanced to attack them. The two armies were equal in numbers, each of about seventy thousand men. They met at Kiltich, about half-way between the Rivers Vardar and Struma, and a day’s march from Salonika. The Greeks inflicted a very severe defeat on their foes. This was followed up a few days later by victories at Doiran and Strumnitza. In the fortnight which followed the Bulgarians were defeated in a series of engagements as they retreated to their own frontier.

The prediction and warnings of the Russian Government were now verified. The Roumanians, when they found that the Bulgarians were involved in war with the other Balkan States, announced that they were dissatisfied with the small concession of territory made to them at the Conference in London—namely the fortress of Silistria and a belt of land on the Danube. They insisted on a further cession of territory to them in the Dobrudscha. They sent an army across the Danube, on July 10th, to support this demand. It advanced without opposition to within a few miles of Sofia. The Turks also saw the opportunity of retrieving out of the scramble something of their recent great losses of territory. They determined to tear up the treaty of London, signed only a few weeks ago. They sent an army, under Enver Pasha, into Thrace, on July 15th, to attack Adrianople. It had no difficulty in recapturing that most important city, from which the Bulgarians had withdrawn nearly the whole of its garrison in order to strengthen their armies against Greece and Serbia. It also reoccupied Demotika and Kirk Kilisse.

The Bulgarians found themselves in a most perilous position. Their armies had everywhere been defeated and driven back. They were surrounded by invading armies. They were compelled to sue for terms. On July 31st an armistice was agreed to, and a Conference was decided on, to be held at Bucharest, between the representatives of the Balkan States, without the presence of those of the Great Powers. At the Conference the Bulgarians found themselves in the position of being hoist with their own petard. They were compelled by force majeure not only to give up all their ambitious projects, but also to make serious concessions to all their rivals. Had they been willing to come to terms at the Conference at London or, later, to submit to the arbitration of Russia, they would undoubtedly have secured for themselves a large slice of Macedonia. They would have retained possession of a great part of Thrace, with Adrianople and Demotika, and the only concessions they would have made were Silistria and the small belt of land on the Danube. They were now compelled to agree to the division of the whole of Macedonia between Greece and Serbia. They had to surrender a part of the Dobrudscha to Roumania, and the larger part of their conquests in Thrace, including Adrianople, to the Turks. All that remained to them in return for their stupendous efforts in the recent wars was a small portion of Thrace with a narrow frontage to the Ægean Sea, but without a port of any value or importance. Never was there a case in which base treachery and overweening arrogance were followed by more fatal retribution.

Greece got the larger share of the spoil of Turkey in the two years of war. It obtained rather more than half of Macedonia—namely 17,000 square miles, with a population of 1,697,000. It also secured the final cession to it of the important island of Crete, and of Samos, and other islands in the Ægean Sea. Its territory and population were increased by more than one-half. Serbia obtained 15,000 square miles, with 1,656,000 inhabitants, Bulgaria only 9,600 miles and 125,000 inhabitants. Roumania secured 2,600 square miles, with 286,000 inhabitants, and Montenegro 2,100 square miles and 251,000 population; while the Turks lost 54,000 square miles, inhabited by a population of 4,239,000. But the recovery of Adrianople, Demotika, and Kirk Kilisse was a great coup for them. It redounded to the prestige of the Young Turks and their leader, Enver Pasha, who soon became Minister of War.