The Treaty of Neuilly was one of the series of treaties after World War I, which included the Treaty of Versailles, the Treaty of Saint-Germain, the Treaty of Trianon, and the Treaty of Sèvres, which were intended to diminish the military and political strength of the defeated members of the Central Powers. Some areas with a Bulgarian majority population (such as Bosilegrad and part of the Dimitrovgrad municipality) were ceded to Serbia (part of the Kingdom of Serbs, Croats and Slovenes).