Treaty of Lausanne

peace treaty between the Turkish government and the Allied Powers at the aftermath of World War I, replacing the Treaty of Sèvres

The Treaty of Lausanne was signed in 1923, after Turkey had won the Greco-Turkish War in 1919 to 1922. It settles the border between Greece and Turkey and the other borders of Turkey. Other countries that signed the treaty were Italy, France, the United Kingdom, Japan and Yugoslavia.

The Treaty of Lausanne changed the borders of Bulgaria, Greece and Turkey.
The red lines show Turkey's new borders.
Because of the Treaty of Lausanne, Turkey was not responsible for what is now called the Armenian Genocide. This is a caricature from a newspaper in 1924.

Greece and Turkey still have disputes that are often focused on the question over the country that owns islands and rocks, most of which are uninhabited, in the Aegean Sea. In 1987 and 1996, those disputes almost led to military conflict.