A similar thing  happened in 1868, when the Rječina became the border between the Croatian and Hungarian parts of Austria-Hungary. After World War I it became for a very short time the border between the Free State of Fiume and the Kingdom of the Serbs, Croats and Slovenes.
In 1868, the Rječina marked the division between Croatian and Hungarian areas within Austria-Hungary. After World War I, it served as a border for an extremely brief period between the Free State of Fiume and the Kingdom of Serbs, Croats, and Slovenes.