The Czech state, formerly known as Bohemia (Čechy), was formed in the late 9th century as a small duchy around Prague, at that time under the dominance of the powerful Great Moravian Empire. After the fall of the Empire in 907, the centre of power was transferred from Moravia to Bohemia, under the Přemyslids. Since 1002 it was formally recognized as part of the Holy Roman Empire. In 1212 the duchy was raised to a kingdom and during the rule of Přemyslid dukes/kings and their successors, the Luxembourgs, the country reached its greatest territorial extent (13th–14th century). During the Hussite wars the kingdom faced economic embargoes and crusades from all over Europe. Following the Battle of Mohács in 1526, the Kingdom of Bohemia was gradually integrated into the Habsburg monarchy as one of its three principal parts, alongside the Archduchy of Austria and the Kingdom of Hungary. The Bohemian Revolt (1618–20) lost in the Battle of White Mountain, led to Thirty Years' War and further centralization of the monarchy including forced recatholization and Germanization. With the dissolution of the Holy Roman Empire in 1806, the Bohemian kingdom became part of the Austrian Empire. In the 19th century the Czech lands became the industrial powerhouse of the monarchy and the core of the Republic of Czechoslovakia which was formed in 1918, following the collapse of the Austro-Hungarian Empire after World War I. After 1933, Czechoslovakia remained the only democracy in central and eastern Europe.
Following the Munich Agreement and the Polish annexation of Zaolzie, Czechoslovakia fell under German occupation during World War II. By 1945, a major portion of the country was liberated by the Red Army, and the subsequent gratitude towards the Soviets, combined with disillusionment with the West for failing to intervene, led the Communist Party of Czechoslovakia to the majority of seats in the 1946 elections. In the 1948 coup d'état, Czechoslovakia became a communist-ruled state. In 1968, the increasing dissatisfaction culminated in attempts to reform the communist regime. The events, known as the Prague Spring of 1968, ended with an invasion by the armies of the Warsaw Pact countries (with the exception of Romania); the troops remained in the country until the 1989 Velvet Revolution, when the communist regime collapsed. On 1 January 1993, Czechoslovakia peacefully dissolved into its constituent states, the Czech Republic and the Slovak Republic.
The Slovak Republic is a landlocked state in Central Europe. It has a population of over five million and an area of about 49,000 square kilometres (19,000 sq mi). Slovakia is bordered by the Czech Republic and Austria to the west, Poland to the north, Ukraine to the east and Hungary to the south. The largest city is the capital, Bratislava, and the second largest is Košice. The official language is Slovak, a member of the Slavic language family.The Slavs - ancestors of the Slovaks - arrived in the territory of present-day Slovakia in the 5th and 6th centuries during the migration period. During the 9th century, Slavic ancestors of the Slovaks established another political entity, the Principality of Nitra, which later together with the Principality of Moravia, formed Great Moravia. After the 10th century the territory of today's Slovakia was gradually integrated into the Kingdom of Hungary which itself became part of the Austro-Hungarian Empire or Habsburg Empire. After WWI and the dissolution of the Austro-Hungarian Empire, the nation of Slovaks and Czechs established their mutual state - Czechoslovakia. A separate Slovak state existed during World War II and was a client state of Nazi Germany (from 1939 to 1944). In 1945 Czechoslovakia was reestablished. The present-day Slovakia became an independent state on 1 January 1993 after the peaceful dissolution of Czechoslovakia.
Austria, officially the Republic of Austria (German: About this sound Republik Österreich), is a federal republic and a landlocked country of roughly 8.5 million people in Central Europe. It is bordered by the Czech Republic and Germany to the north, Hungary and Slovakia to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the west. The territory of Austria covers 83,855 square kilometres (32,377 sq mi) and has alpine climate. Austria's terrain is highly mountainous, lying within the Alps; only 32% of the country is below 500 metres.
The origins of modern-day Austria date back to the time of the Habsburg dynasty when the vast majority of the country was a part of the Holy Roman Empire. From the time of the Reformation, many Northern German princes, resenting the authority of the Emperor, used Protestantism as a flag of rebellion. The Thirty Years War, the influence of the Kingdom of Sweden and Kingdom of France, the rise of the Kingdom of Prussia, and the Napoleonic invasions all weakened the power of the Emperor in the North of Germany, but in the South, and in non-German areas of the Empire, the Emperor and Catholicism maintained control. During the 17th and 18th centuries, Austria was able to retain its position as one of the great powers of Europe and, in response to the coronation of Napoleon as the Emperor of the French, the Austrian Empire was officially proclaimed in 1804. Following Napoleon's defeat, Prussia emerged as Austria's chief competitor for rule of a larger Germany. Austria's defeat by Prussia at the Battle of Königgrätz, during the Austro-Prussian War of 1866 cleared the way for Prussia to assert control over the rest of Germany. In 1867, the empire was reformed into Austria-Hungary. After the defeat of France in the 1870 Franco-Prussian War, Austria was left out of the formation of a new German Empire, although in the following decades its politics, and its foreign policy, increasingly converged with those of the Prussian-led Empire. During the 1914 July Crisis that followed the assassination of Archduke Franz Ferdinand of Austria, the German Empire guided Austria in issuing the ultimatum to Serbia that led to the declaration of the First World War.
After the collapse of the Habsburg (Austro-Hungarian) Empire in 1918 at the end of World War I, Austria adopted and used the name the Republic of German-Austria (Deutschösterreich, later Österreich) in an attempt for union with Germany, but was forbidden due to the Treaty of Saint-Germain-en-Laye (1919). The First Austrian Republic was established in 1919. In the 1938 Anschluss, Austria was occupied and annexed by Nazi Germany. This lasted until the end of World War II in 1945, after which Germany was occupied by the Allies and Austria's former democratic constitution was restored. In 1955, the Austrian State Treaty re-established Austria as a sovereign state, ending the occupation. In the same year, the Austrian Parliament created the Declaration of Neutrality which declared that the Second Austrian Republic would become permanently neutral.