To avoid defeat until the Americans gave up<span />
The term "democracy" first appeared in ancient Greek political and philosophical thought in the city-state of Athens during classical antiquity. The word comes from demos, "common people" and kratos, strength. Led by Cleisthenes, Athenians established what is generally held as the first democracy in 508–507 BC.
A large theme in anti-German propaganda was Adolf Hitler being portrayed as the Devil. This was in WWII, I am not sure about WWI
Napoleon Bonaparte. Louis XVI and Marie Antoinette were King and Queen during the French Revolution and both of them were beheaded.