The Regat is a Romanian-language term ascribed for the initial territorial extent of the Kingdom of Romania before World War I, roughly the regions of the current state of Romania to the south and east of Transylvania.

Consequently, this territory includes Western Moldavia, Northern Dobruja, Muntenia, Oltenia, and the Hertsa region (now in Chernivtsi Oblast, southwestern Ukraine).

Most of the Regat German population was re-settled in the mid 20th century during World War II through the Heim ins Reich national socialist population transfer policy.

As part of the Nazi-Soviet population transfers and the Heim ins Reich ("Home into the Empire") population transfer policy, Nazi Germany called ethnic Germans abroad to settle in the former Polish territories.

[1] Ethnic Germans from Romania resettled by Nazi Germany between 1939 and 1944[2]