Which nation's round shields were the best in history?

Which nation’s round shields were the best in history?

Answer:

It is entirely impossible to know which nation had the best round shields in history, as archaeological evidence is not widespread enough nor is there enough study placed within this issue. Also the question of what makes a shield the “best” is a difficult one, as some would claim that weight was the most important whilst other would claim durability and strength to be better. For example, a Greek bronze shield would be extremely effective at blocking blows from an enemy soldier but are notoriously heavy whilst a wooden shield of the Medieval Period would be far more light but much less effective at blocking sword blows. In short it is impossible to say what is the best round shield in history as it entirely depends on how it is used and the skill of the user.