This document discusses the formation of the Czechoslovak Legion during WWI and its effects on Czechoslovakia's treatment during later eras. The Legion was formed by Czech and Slovak volunteers fighting under the Allies to help establish an independent Czech state after the war, in line with Woodrow Wilson's principle of self-determination. However, the Legion's actions also made Czechoslovakia a target for political revenge by the Soviet Union during WWII and the Cold War. The paper will examine the Legion's role in WWI, the Russian Civil War, and early Czech statehood to understand how it impacted Czechoslovakia's treatment in the later 20th century.