During medieval times there was a role that served to protect his king. The Knight. As Knight he would serve his king during battles. The King had the highest role in the feudal system. Knights did not have as many privileges as the king. Knights could get paid in the many different ways such as money or land
A tournament in this case is a series of trials for the knight to impress the king. If the Knight won this he would be able to impress the king and earn his respect. In this case it was hard to impress the king
If you went to battle with the king you would have to be very skilled during battle. This meant learning tactics to win. Also you would need to wear heavy but durable armour to protect yourself from swords and arrows.