Cadrilater
On 7 September 1940, Southern Dobruja was restored to Bulgaria under the Treaty of Craiova. The treaty was followed by a mandatory population exchange: about 110,000 Romanians (almost 95% of whom settled there after 1913), Aromanians and Megleno-Romanians were forced to leave Southern Dobruja, whereas 77,000 Bulgarians had to leave Northern Dobruja. Only a few hundred Romanians and Aromanians are now left in the region.