

According to the 1921 census, the number of inhabitants was 27.2 million. In 1938, the Second Republic was the sixth largest country in Europe. The Second Republic ceased to exist in 1939, when Poland was invaded by Nazi Germany, the Soviet Union and the Slovak Republic, marking the beginning of the European theatre of World War II.

The state was established in 1918, in the aftermath of World War I. The Second Polish Republic, at the time officially known as the Republic of Poland, was a country in Central and Eastern Europe that existed between 19. As Chief of State ( Naczelnik Państwa).
