The Neutrality Acts in general, which were passed in the 1930s, were passed as Europe was once again moving towards armed conflict. The US was a very isolationist country after World War I and wanted to make it clear to the world that they would not intervene.
Answer:
World War I
Explanation:
Image result for what caused the start of world war 1
The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, and nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary.
They toss coins because they believe its good luck and also becuase of his motto : "a penny saved is a penny earned"
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