The Gunpowder Plot was a failed attempt to blow up England’s King James I (1566-1625) and the Parliament on November 5, 1605. The plot was organized by Robert Catesby (c.1572-1605) in an effort to end the persecution of Roman Catholics by the English government.
The main reason why the the United States did not sign the Treaty of Versailles is because they thought it was a bad idea to "punish" Germany by demanding massive reparations payments, and the US turned out to be right, since this only caused Germany to rise up militarily once again.