Why was their dissatisfaction was created in Europe after the First World War?

1)       The international situation became unstable and alarming after the First World War.
2)       The Great Economic depression gave rise to dissatisfaction among common people.
3)       There was a growing tension among the defeated nations due to the insulting sanctions imposed upon them.
4)       The victorious nations also had been desirous (eager) of more power.

5)       All these factors led to the dissatisfaction which prevailed all over Europe.