What are the cultural differences between the great plains tribes such as the sioux and the cheyenne, and the native american tribes of the southwest such as the navajo and the apache?

First, they are different places, so depending on where you live everything changes.

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.

it made the ground more soft which is better for the world because no one likes walking on a rocky road it hurts your feet