The major reason Napoleon's invasion of Russia failed was because he attacked at the wrong time.
Granted, summer is generally the time used to start invasions against cold-weather countries (as seen by the invasion of France and Germany in their respective times). However, many of them did not think of a long-term fight, and were generally tied up in the western-half of Russia, before being beaten back by weather, shortages, and the Russians.
~<em>Rise Above the Ordinary</em>
In Hungary and Czechoslovakia. The state stayed in presence until 1989 when resistance strengths solidified in constraining the administration to desert socialism. The state viewed itself as the beneficiary to the Hungarian Soviet Republic, which was framed in 1919 as the principal Communist state made after Soviet Russia.
I think it becomes difficult because they all wanted to have more advantages than anyone else, that became too much for the country that they defeated. The Potsdam Conference became difficult because they have problems on the things that they should do with Germany that they want to completely disarm the country.
Explanation:
Italy, Japan, and Germany were known as the Axis Powers during WW2.
:)