Celebration of Czech-USA relations post-WW1. U.S. President Woodrow Wilson and the United States played a major role in the establishment of Czechoslovakia on October 28, 1918. President Wilson's 14 Points, including the right of ethnic groups to form their own states, were the basis for the union of the Czechs and Slovaks. Tomas Masaryk, the father of the state and its first President, visited the United States during World War I and worked with U.S. officials in developing the basis of the new country. Masaryk used the U.S. Constitution as a model for the first Czechoslovak constitution. Date: 1918