Territory of present-day Czech Republic and Slovakia is part of the Habsburg-ruled Austrian Empire.
Dual monarchy of Austria-Hungary is established. Czech lands of Bohemia and Moravia are under Austrian control; Slovakia is part of Hungary.
Treaty of Versailles disbands Austria-Hungary and creates Czechoslovakia.
Czechoslovakia cedes Carpatho-Ukraine to the Soviet Union.
Czech Republic and Slovakia formally separate into two nations.
You won't find the labels "Czech" or "Slovak" on historical maps. In the past, those modern nations' territory was ruled by Austria (Czech provinces of Bohemia and Moravia) and Hungary (Slovakia). See the “Austria and Hungary section for more maps of these lands within the Austrian Empire and Austria-Hungary.
