Following are the reason for World War ll-->1. dissatisfaction with the treaty of Versailles .2. rise of fascism and Nazism.3. policy of appeasement.4. Japanese invasion of China.5. failure of the league of nation and6. Hitler's invasion of Poland.#####.........####.....#####...the reason behind the World War II can be defined as--1. the Global economic crisis.2. after the invasion of Poland England and France declared war against Germany.3. this led tension between the allied Nations.4. And led World War 2

Reasons for World War II
World War II was a global conflict that lasted from 1939 to 1945, involving many countries across the world. There were several reasons that led to the outbreak of this devastating war.

Rise of Totalitarian Regimes
- The rise of totalitarian regimes in countries like Germany, Italy, and Japan contributed to the tensions that eventually led to World War II.
- Leaders like Adolf Hitler in Germany, Benito Mussolini in Italy, and Emperor Hirohito in Japan sought to expand their territories and influence through aggressive military actions.

Treaty of Versailles
- The harsh terms imposed on Germany by the Treaty of Versailles after World War I, such as massive reparations and territorial losses, left many Germans feeling humiliated and resentful.
- This created a sense of injustice and a desire for revenge, which fueled Hitler's rise to power and his ambition to restore Germany's former glory.

Failure of Appeasement
- The policy of appeasement by Western powers, such as Britain and France, towards aggressive actions by totalitarian regimes only emboldened them further.
- Attempts to avoid conflict by giving in to the demands of aggressors ultimately failed to prevent the outbreak of war.

Expansionist Policies
- Countries like Germany, Italy, and Japan pursued expansionist policies that threatened the stability of the international order.
- Aggressive actions, such as the invasion of Poland by Germany and the occupation of Manchuria by Japan, sparked widespread conflict and eventually led to the global escalation of the war.
In conclusion, World War II was a result of a complex combination of factors, including the rise of totalitarian regimes, the legacy of World War I, the failure of appeasement, and aggressive expansionist policies. These factors created a volatile environment that ultimately led to the outbreak of one of the deadliest conflicts in human history.