 In 1918, a short-lived, unrecognised State of Slovenes, Croats and Serbs was formed out of parts of Austria-Hungary, comprising most of the former monarchy's Adriatic coastline and the entire present-day Croatian Littoral.Later that year, the Kingdom of Serbia and the State of Slovenes, Croats and Serbs formed the Kingdom of Serbs, Croats and Slovenes—subsequently renamed to Yugoslavia.The new union's proponents at the time in the Croatian Parliament saw the move as a defence against Italian expansionism such as via provisions of the 1915 Treaty of London.