context: In the first Balkan war in 1912, four countries: Bulgaria, Greece, Montenegro, and Serbia united, defeating the Ottoman Empire. The war broke out with Montenegro declaring war on the Ottoman Empire on October 8, 1912, then Bulgaria and Serbia joined it on October 17 and Greece on October 19. The war ended seven months later after the London Treaty on May 30, 1913. The Ottomans lost more than eighty percent of their lands in the European section, and because of this the great flow of about two and a half million Muslims from the previous Ottoman lands began into the existing part of the Ottoman Empire. In Turkey, the results of the Balkan war were considered a major catastrophe, and Chief of Staff Nazim Pasha was accused of being responsible for the defeat in it, and he was assassinated on January 23, 1913 during the coup of 1913 by members of the girl group Turkey.
question: When did the first Balkan war end?
answers.text: May 30, 1913