We entered WW1 with the USS Main getting hit with a mine.
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The Maine was a United States Navy ship that sank in Havana Harbor on February 15, 1898
WWI began 16 years later.
No. PIF, you are wrong, midwest_hiker is right.
And World War II began over the issue of slavery and states rights in America. The Vietnam war started with the assassination of Archduke Fernidand. And the American Civil War was started by this little crazy German dude named Hitler.