I'm looking at this drawing by Samuel de Champlain and it seems like both groups are standing out in the open shooting volleys of arrows at each other. They were also apparently formed densely enough that Samuel was able to hit two with one shot by loading his gun with multiple bullets. Is this an accurate reading, and did contact with Europeans cause a major shift how Native Americans waged war?
Not to dissuade further answers, but check out the Pre-Columbian Americas Warfare Section of our wiki as well as this older thread on pre-Columbian warfare in the Americas.
I'm curious about that ... that's a picture of an engraving based upon Champlain's original drawing, not Champlain's original drawing itself. Can you find a picture of the original?