With the collapse of the Habsburg monarchy at the end of World War I, the independent country of Czechoslovakia (Czech, Slovak: Československo) was formed as a result of the critical intervention of U.S. President Woodrow Wilson, among others.
The Czechs and Slovaks were not at the same level of economic and technological development, but the freedom and opportunity found in an independent Czechoslovakia enabled them to make strides toward overcoming these inequalities. However, the gap between cultures was never fully bridged, and this discrepancy played a disruptive role throughout the seventy-five years of the union.
The creation of Czechoslovakia in 1918 was the culmination of a struggle for ethnic identity and self-determination that had simmered within the multi-national empire ruled by the Austrian Habsburg family in the 19th century. The Czechs had lived primarily in Bohemia since the 6th century, and German immigrants had settled the Bohemian periphery since the 13th century. After 1526, Bohemia came under the control of the House of Habsburg as their scions first became the elected rulers of Bohemia, then the hereditary rulers of the country. Following the Battle of White Mountain in 1620, 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. With the rise of nationalist political and cultural movements in the Czech lands (the Czech National Revival) and the Slovak lands (the Slovak National Revival instigated by Ľudovít Štúr), mounting ethnic tensions combined with repressive religious and ethnic policies (such as the forced Magyarization of Slovaks) pushed the cohesion of the multi-national Austro-Hungarian Empire ruled by the Habsburgs to the breaking point.