Answer:
There is no historical record of a king dying from drinking chocolate milk. While chocolate was introduced to Europe in the 16th century, it was initially consumed as a beverage mixed with hot water or wine. Milk chocolate, which is the type of chocolate typically used to make chocolate milk, was not invented until the late 19th century. Therefore, it is highly unlikely that a king would have died from drinking chocolate milk. It is possible that there are legends or myths related to a king's death from drinking chocolate milk, but there is no factual basis for such stories.