In the painting Natives are wearing traditionnal clothes like moccasins, buffalo skins and feathers
Natives used traditional weapons like bows and arrows, tomahawks
On the left we can see wild animals like buffaloes and grizzly bears
Natives traveled with horses
On the left, we can see dark clouds and "Wild West" territories like the Rocky Mountains and the Great Plains.
Settlers used telegraph to communicate
Natives were nomads, they lived in tepees in Great Plains in the west.
whereas settlers lived in big cities and farmers lived in cabins.
while settlers are wearing western clothes like cowboy hats, boots and shirts.
However on the right there is a bright and blue sky and urbanized territories for example a city, a bridge and boats.
but Settlers used modern firearms (rifles and guns).
unlike Settlers who traveled with more modern transportation like stagecoach and steamtrains.
whereas on the right there are domesticated animals such as stagecoach horses and oxen (cattle).
unlike Natives who used smoke signals.