"how to play indian"

This article is a list of rules that the Indians would fallow when attacking the white man. After reading them I started to think about the Indian movies I have seen and I remember the Indians doing some of these things when attacking. Such as showing a smoke signal before attacking also they only attack in the day. I do not understand why they do these things but I guess it is a sort of honor code. Also after I read all of the rules I wondered do they have to fallow every single one or is there like a couple main ones? And do the cowboys have rules for attacking? I think cowboys just attack when needed, they never really seem to have a plan entill 5 minutes before the attack. Indians attack methods are so thought out.