1944 Romanian coup d'état
The 1944 Romanian coup d'état, better known in Romanian historiography as the Act of 23 August (Romanian: Actul de la 23 august), was a coup d'état led by King Michael I of Romania during World War II on 23 August 1944. With the support of several political parties, the king removed the government of Ion Antonescu, which had aligned Romania with Nazi Germany, after the Axis front in northeastern Romania collapsed in the face of a successful Soviet offensive.
Source: Wikipedia — 1944 Romanian coup d'état (CC BY-SA 4.0)