Yeah Jim, Samoans, Maoris, and other Pacific Island people can all be pretty scary in aggression mode. Two thousand years of selective breeding does have some effect.
However, although the physical effect of selective breeding is principally responsible for the remarkable physique and abilities of these people, it is not responsible for the aggression. This aggression is the result of social organisation. There is a lesson to be learnt from this which is particularly applicable to all of us at the present time.
Ever heard of the Moriori? Chatham Islands?
Have a look at this:-
http://www.davekopel.com/NRO/2003/Moriori-Lesson.htm
This is not weaponry, but in my opinion is something that can assist the understanding of weaponry.