The Little Entente was an alliance formed in 1920 and 1921 by Czechoslovakia, Romania and Yugoslavia. The three nations united to form a common defence against Hungary, and to decrease the chances of the House of Austria returning to power – at the time, it was one of the most influential and outstanding royal houses of Europe.
France also had a hand in the Little Entente – which you probably already guessed due to its name. Under the treaty, the French promised aid to the Czechs if they were ever threatened by Germany. They upheld their end of the bargain until Daladier, the French Prime Minister, was forced to abandon the treaty in 1938 when it became clear that the British Prime Minister, Neville Chamberlain, was not prepared to offer support to the French because of it. And so, the treaty was dissolved that year. Harsh or what?
If the treaty had remained in place, things might have turned out very differently; upon invading Czechoslovakia, Hitler could have been defeated by France. As it stands, a lack of action by the French over Hitler’s occupation of the Rhineland in 1936 and the subsequent collapse of the Little Entente encouraged Hitler to continue with his territorial demands. So, not good.