Free State of Bottleneck
The Free State of Bottleneck (German: Freistaat Flaschenhals) was a short-lived quasi-state that existed from 10 January 1919 until 25 February 1923. It was formed from part of the Prussian province of Hesse-Nassau as a consequence of the occupation of the Rhineland following World War I. The Bottleneck is now part of the German states of Hesse and Rhineland-Palatinate.