Treaty of Neuilly-sur-Seine

Treaty of Neuilly-sur-Seine

Bulgaria after Treaty of Neuilly-sur-Seine
Signed	27 November 1919
Location	Neuilly-sur-Seine, France
Condition	Ratification by Bulgaria and four Principal Allied Powers.
Signatories	Bulgaria France  Greece  Italy  Japan Romania  Kingdom of Serbia  United Kingdom  United States Other Allied Powers  Belgium Republic of China  Cuba  Hejaz Poland  Portugal  Siam Czechoslovakia
Depositary	French Government
Languages	French (primary), English, Italian

The Treaty of Neuilly-sur-Seine required Bulgaria to cede various territories, after Bulgaria had been one of the Central Powers defeated in World War I. The treaty was signed on 27 November 1919 at Neuilly-sur-Seine, France.

The treaty required Bulgaria

The signing ceremony was held in Neuilly's town hall (hôtel de ville).

In Bulgaria, the results of the treaty are popularly known as the Second National Catastrophe. Bulgaria subsequently regained South Dobruja as a result of the Treaty of Craiova. During World War II, together with Nazi Germany, it temporarily reoccupied most of the other territories ceded under the treaty.

Four minor regions (historiographically referred to by Bulgarians as the Western Outlands) had been part of Bulgaria from its inception as a principality in 1878, except for the region around Strumitsa, which became part of Bulgaria in 1912. Bulgaria was internationally recognised as an independent country in 1908 and controlled these territories until 1919 when they were ceded to the Kingdom of the Serbs, Croats and Slovenes under the Treaty of Neuilly. The cession of the region was partly a compensation for the occupation of the southern and eastern part of Serbia by Bulgarian troops between 1915 and 1918, and was partly motivated by strategic reasons. The old political boundary between Bulgaria and Serbia followed a chain of high mountain ridges, whereas the new one gave significant military and strategic advantages to the Serbs: it dangerously exposed the Bulgarian capital of Sofia and significantly reduced the military threat to eastern Serbia in case of a Bulgarian invasion (see also Balkan Wars and World War I).

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).