In your words, discuss the events that took place during real life in the west.

Western North America was inhabited for a millennia by various groups of Native Americans and later served as a frontier to European powers, beginning with Spanish colonization in the 16th century. British, French, and Russian claims followed in the 18th and 19th centuries. After the American Revolution, the newly independent United States began securing its own frontier from the Appalachian Mountains westward for settlement and economic investment by American citizens.