The study deals with the first and second wars of the Balkans (1912-1913) and the economic, social and political crises that ensued. In fact, the events of these complex and complex wars have since constituted a major problem for European countries. The research also discusses the policy of the Ottoman Empire in the Balkans, its political and military status prior to the declaration of war, the Balkan alliance, the secret files of March 13 until the end of September 1912, and the peace talks between the two parties to the London Treaty of May 30, 1913. The former Balkan allies shared the spoils of the First War, the 1913 peace treaties and the outcome of the war.