There are many reasons why third parties do not last , two of the main are lack of money and Lack of popularity . Another good reason would be they don't have the same interest that most citizens would want.
Explanation: The Allies told Hitler to stop expanding after they took Czechoslovakia. When They Invaded Poland. The British And French Declared War on Germany, starting WW2. The Soviets Joined and split Poland between them and Nazi Germany.
