You should look it up on google!
i meen, hello pplz? ever tried that before this website?
The evacuation of Dunkirk
I think its because of power or it commands more of respect or it was for decoration for the helmet. i hope this helps you.
Cahokia was one of the largest and possibly the capital city of the people that are referred to as the Mound Builders. Cahokia's size and the large number of people that lived there led to the main issues. Bad droughts and poor harvests meant people couldn't eat.