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| 1913, Jan. 6 |
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| Breakdown of the London conference, because of the refusal of the Ottomans to give up Adrianople, the Aegean Islands, and Crete. | 1 |
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| Feb. 3 |
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| Resumption of the war. | 2 |
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| March 5 |
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| The Greeks took Janina. | 3 |
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| March 26 |
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| The Bulgarians took Adrianople. | 4 |
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| April 16 |
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| The Bulgarians and Ottomans concluded an armistice, which was accepted by other belligerents. | 5 |
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| April 22 |
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| The Montenegrins took Scutari (See 1913, April 10), despite protests of the powers, who had assigned it to Albania. | 6 |
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| May 3 |
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| Under threat of war from Austria, the Montenegrins gave up Scutari, and the Serbs evacuated Durazzo (May 5). | 7 |
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| May 7 |
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| An ambassadorial conference at St. Petersburg awarded to Romania the town of Silistria, without the fortifications, as compensation for the gains of Bulgaria. | 8 |
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| May 20 |
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| Reopening of the London peace conference. The victorious allies were obliged by an ultimatum from Grey to accept the settlement agreed to by the great powers. | 9 |
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| May 30 |
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| TREATY OF LONDON, ending the First Balkan War. The Ottomans ceded all territory west of a line between Enos and Midia and abandoned all claim to Crete; the status of Albania and of the Aegean Islands was left to the decision of the powers. | 10 |
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| June 1 |
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| Treaty of alliance between Serbia and Greece against Bulgaria. This was the result of Serbia's failure to make good its claims on the Adriatic and the unwillingness of Bulgaria to grant Serbia more of Macedonia than had been envisaged in the treaty of March 13, 1912. The Bulgarians were willing to leave the matter to the arbitration of the tsar, which the Serbs tried to evade. | 11 |
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| June 29–July 30 |
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| SECOND BALKAN WAR. The Bulgarian commander, Gen. Michael Savov, ordered an attack on the Serbian-Greek positions without informing the prime minister, Stojan Danev, who was just leaving for St. Petersburg. The government disavowed the action, but the Serbs and Greeks took advantage of the situation to carry out the attack they had long planned. Romania and the Ottomans entered the war against Bulgaria, which was rapidly defeated. | 12 |
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