<span>The assassination of the Archduke Ferdinand of Austro-Hungary and his wife in Sarayevo on June 1914</span>
This kind of horrific...just a warning. Kids would be given dog tags as a sign of identification. At that time, the nuclear war was taking place. Parents would have their kids wear dog tags so that if they died, they would be able to identify the children's bodies.
Increasing demand for skilled labor