First Czechoslovak Republic in the context of "Buffer state"

Moravia is a historical region in the east of the Czech Republic and one of three historical Czech lands, with Bohemia and Czech Silesia.

The medieval and early modern Margraviate of Moravia was a crown land of the Lands of the Bohemian Crown from 1348 to 1918, an imperial state of the Holy Roman Empire from 1004 to 1806, a crown land of the Austrian Empire from 1804 to 1867, and a part of Austria-Hungary from 1867 to 1918. Moravia was one of the five lands of Czechoslovakia founded in 1918. In 1928 it was merged with Czech Silesia, and then dissolved in 1948 during the abolition of the land system following the communist coup d'état.

The Lands of the Bohemian Crown were the states in Central Europe during the medieval and early modern periods with feudal obligations to the Bohemian kings. The crown lands primarily consisted of the Kingdom of Bohemia, an electorate of the Holy Roman Empire according to the Golden Bull of 1356, the Margraviate of Moravia, the duchies of Silesia, and the two Lusatias, known as the Margraviate of Upper Lusatia and the Margraviate of Lower Lusatia, as well as other territories throughout its history. This agglomeration of states nominally under the rule of the Bohemian kings was referred to simply as Bohemia.

The joint rule of Corona regni Bohemiae was legally established by decree of King Charles IV issued on 7 April 1348, on the foundation of the original Czech lands ruled by the Přemyslid dynasty until 1306. By linking the territories, the interconnection of crown lands thus no more belonged to a king or a dynasty but to the Bohemian monarchy itself, symbolized by the Crown of Saint Wenceslas. During the reign of King Ferdinand I from 1526, the lands of the Bohemian Crown became a constituent part of the Habsburg monarchy. A large part of Silesia was lost in the mid-18th century, but the rest of the Lands passed to the Austrian Empire and the Cisleithanian half of Austria-Hungary. By the Czechoslovak declaration of independence in 1918, the remaining Czech lands became part of the First Czechoslovak Republic.

The Kingdom of Hungary, referred to retrospectively as the Regency, the Horthy era, the Horthy regime, and Horthyist Hungary, existed as a country from 1920 to 1946 under the rule of Miklós Horthy for the 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.

Horthy came to power after supressing the Hungarian Soviet Republic during the period of White Terror, installing an authoritarian political system relying on the traditional economic elites and bureaucracy. Hungary under Horthy was characterized by its conservative, nationalist, and fiercely anti-communist character; some historians have described this system as para-fascist. The government was based on an unstable alliance of conservatives and right-wingers; while conservatism was predominant in the 1920s, afterwards Horthy manoeuvered between conservatives and the radical right with fascist leanings. Foreign policy was characterized by revisionism — the total or partial revision of the Treaty of Trianon, which had seen Hungary lose over 70% of its historic territory along with over three million Hungarians, who mostly lived in the border territories outside the new borders of the kingdom, in the Kingdom of Romania and the newly created states of Czechoslovakia and the Kingdom of Serbs, Croats and Slovenes (in greatly enlarged Romania there also remained a significant Hungarian population in Székely Land). Republican Austria, the successor of the former other half of the dual monarchy also received some minor territory from Hungary. Thus the post-1918 kingdom can be described as a rump state. Hungary's interwar politics were dominated by a focus on the territorial losses suffered from this treaty, with the resentment continuing until the present. After a period of international isolation in the 1920s, it began maintaining ties with Fascist Italy and Nazi Germany.

The Republic of German-Austria (German: Republik Deutschösterreich, alternatively spelt Republik Deutsch-Österreich), commonly known as German-Austria (German: Deutschösterreich), was an unrecognised state that was created following World War I as an initial rump state for areas with a predominantly German-speaking and ethnic German population within what had been the Austro-Hungarian Empire, with plans for eventual unification with Germany. The territories covered an area of 118,311 km (45,680 sq mi), with 10.4 million inhabitants.

In practice, however, its authority was limited to the Danubian and Alpine provinces which had been the core of Cisleithania. Much of its claimed territory was de facto administered by the newly formed Czechoslovakia, and internationally recognized as such.

Transcarpathia is a historical region on the border between Central and Eastern Europe, mostly located in western Ukraine's Zakarpattia Oblast.

From the Hungarian conquest of the Carpathian Basin (at the end of the 9th century) to the end of World War I (Treaty of Trianon in 1920), most of this region was part of the Kingdom of Hungary. In the interwar period, it was part of the First and Second Czechoslovak Republics. Before World War II, the region was annexed by the Kingdom of Hungary once again when Germany dismembered the Second Czechoslovak Republic.