To Americans, the history includes both treating Native American tribes as equals and exiling them from their homes. The new U.S. government was thus free to acquire Native American lands by treaty or force. Resistance from the tribes stopped the encroachment of settlers, at least for a while
Answer: they undermined feudalism, they lost a lot of money in the wars
Explanation:
The fall of the Roman Empire begin in the medieval age. The medieval age brought the plagues, famines, diseases and in the middle of it all is feudalism. Feudalism or the feudal system was a dominant social system used in western mainly from the 5th to 11th century. In feudal system land are rewarded to lower classes for services, military services and loyalty.