The government overspending on their King caused them to go into major debt, which did not help them because they did not have no money for funding and this left them no other option but to go to war. The other reason was that they had no ideas. They were in contact with American philosophers and this caused for the spread of new ideas on the way that people should be treated, which also caused for the people to want to go to war. <span />
The main cause of WW1 was the assassination of the Archduke Franz Ferdinand of Austria-Hungary. The other causes are Militarism, Alliances, Nationalism, and Imperialism.
This is the creation of the National Bank.
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The United States feared that if communism was successful on Vietnam, the rest of the countries that border it would soon turn into communism and those other countries that border that new communist country would also be converted to communism and so on. This is called the "domino theory" and made the United States to send troops to prevent the theory from happening.
Roosevelt was disappointed and Hoover was worried cause he didn’t know how to fix the depression