<human>:  When did the First Balkan War start?
<bot>: The First Balkan War started in 1912, and lasted until 1913. It was a war fought between the Balkan League and the Ottoman Empire. The Balkan League was a group of Balkan countries that had a common goal of gaining independence from the Ottoman Empire. The war was a major step towards the dissolution of the Ottoman Empire, and eventually led to the creation of the modern nation states of Albania, Bulgaria, Greece, and Serbia.