Population exchange between Bulgaria and Romania

Ethnic groups in Dobruja around 1918. For the following two decades, the Romanian state would apply a policy of colonization in the southern part.

The population exchange between Bulgaria and Romania was a population exchange carried out in 1940 after the transfer of Southern Dobruja to Bulgaria by Romania. It involved 103,711 Romanians, Aromanians and Megleno-Romanians living in Southern Dobruja and 62,278 Bulgarians from Northern Dobruja. After this operation, the application of a population exchange in other cases such as Transylvania was considered.