It was formed in1918 from Czech-speaking and Slovak-speaking territories of the Austro-Hungarian Empire, although disparate ethnic elements led to internal conflicts before World War II.

• 尽管第二次世界大战前种族分裂因素导致了内战，1918年还是脱离讲捷克语和斯拉夫语的奥匈帝国而形成独立国家。