What were some of the major problems that rome faced in the 3rd ce?

Some of the major problem that the Roman Empire faced during the 3rd century ere invasion, civil war, economic depression, and plague.  Because of these major problems, the Roman Empire nearly collapsed. The crisis that the empire experience started when Emperor Severus Alexander were assassinated by his own troops.

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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.