Mint released a series of “Peace” coins that today command very high prices. But the end of World War I was greeted with such optimism that the U.S. Obviously, that prediction fell short of the mark - a bigger world war arrived a couple decades later, and it was followed by a steady string of smaller wars.
It seems quaint now, but a century ago World War I was known as the “war to end all wars” because of its vicious and deadly battles.