World War Two began in September 1939 and prior to it; there were several major events that acted as its catalyst. On top of the list was, tension that existed between countries, political chaos and unresolved issues arising from the First World War as well are the economic chaos of the war and the great depression of the 1930s. The culmination of all these problems was the invasion of Poland by Germany and also the invasion of China by Japan. These aggression acts were followed by a declaration of war by Britain and France and hence resulting in the Second World War.
There was a lot of tension between countries and more so Germany, Austria, Hungary, Bulgaria and Turkey who had lost in the First World War Germany and all the countries that had lost felt crippled by the Treaty of Versailles. German felt the treaty it was too harsh and that the money it was supposed to pay for damages was too much. There was political chaos that was as a result of the realignment of countries based on political inclinations, and this did not go down well with some countries. Also, the economic chaos put so much economic problems on the countries that lost WWI and more so Germany; and this acted as a catalyst for discontent and hence triggered the war.
During the build up to WWII, America wanted to steer clear of the conflicts that existed. One of the reasons this was the case was that most Americans felt that this was a war that concerned Europe and not the United States of America. Besides that, President Roosevelt’s intention was that of joining in the conflict only when it was necessary. This was the case because America already had its hands full with problems that came with the great depression and hence, avoid more trouble that would come with going into war.