This is a reposting of a posting from 2009 that I wrote about how America became involved in World War I. This is to mark the 100th anniversary of America entering the war and the emergence of the USA has the World Power.
This is not a date that most people today remember but it is likely to be remembered has the most important date and event of the twentieth century. It was the day on which the United States declared war on the Central Powers in World War One and basically decided that Germany and her allies would lose, unless they very quickly won. Germany had in effect only a little over a year to achieve this result otherwise she was doomed to lose.