Kingdom of Hungary (1920–1946)

The interwar Kingdom of Hungary, referred to retrospectively as the Regency, the Horthy era, the Horthy regime, and Horthyist Hungary, was the Hungarian state under a monarchy from 1920 to 1946 under the rule of Miklós Horthy for most of its existence, who officially represented the Hungarian monarchy after a period of revolutions and the counter-revolution as the Regent of Hungary. In reality there was no king, and attempts by King Charles IV to return to the throne shortly before his death were prevented by Horthy.

Source: Wikipedia — Kingdom of Hungary (1920–1946) (CC BY-SA 4.0)