World War One started on June 28,1914 when Nedeljko Čabrinović threw a bomb that eventually killed Austria-Hungary's Archduke Franz Ferdinand in which the goal was for Serbia to gain the south-Slav provinces of Austria-Hungary. It bounced off the back of the Duke's car and injured 16-20 people with a crater with a 1 ft diameter … Read more
You are right, we lost the Vietnam war and Russia fought better & lost more troops (by a landslide) than us in wwii so I bet that this belief is to bring more American morale.