Why were native americans moved to smaller and smaller reservations in the 1850s?

The U.S. government forced the Native Americans (then called Indians) to move to reservations in exchange for protection from attacks by white settlers. In addition, the Indians were supposed to be given a yearly payment that would include money in addition to food, livestock, household goods and farming tools. (Unfortunately there is evidence that many of the treaties were not adhered to. Once the Indians were relocated, they were often forgotten about).

The Indians were removed to distant reservations, often on land that was nowhere nearly as good as where they had been living.

d.

the northwest territory became the most densely populated area in the u.s.

both eastern and western early north american cultures were known for building wigwams and longhouses.

wigwams, also called wetus, were small houses of 8-10 feet tall, made of wooden frames covered with woven mats and sheets that were used by algonquian indians. similarly,   longhouses were also used by algonquian and the iroquois tribes, and they were built as well with pole frames and elm bark covering. however, the main difference between wigwams and longhouses is that the latter was much larger than the former, with 200 feet long, 20 feet wide, and 20 feet high with inner raised platforms used for sleeping space.