where do we stand?

i watched Robin Hood and the King was in the first line of army in the war.

i watched Merlin and King Arthur leads all battles and even protects his servant.

i watched Mulan and the King of China told his armies to protect the villagers instead of guarding the castle. 

both Prince William and Harry of England were sent to become armies themselves when they were 17 or 18. they could protect the nation in case anything happens. 

Does the Princes and Kings in Malaysia do the same thing?