In 3-5 sentences, explain what you think were the
most important factors that led to rapid
industrialization in the late 1800s, and why were they
important. choose 2-3 factors.

There were several factors that led to the Rapid Industrialization of United States in the 1800s.

The two major factors were the development of the Steam Engine and Cheap labor in the post civil-war Era .

Explanation:

The invention of the Steam Engine changed everything. Not only did it make transport easier and cheaper for everyone, it helped to introduce mechanized manufacturing and farming. This gave rise to a consumer culture never seen people in the history of human kind.

Also, after the Civil War ended, and the reconstruction era saw the availability of cheap labor and not to mention thousands of migrants who had come to the US for better lives.

All of this contributed to rapid economic growth, westward expansion, urbanization and industrialization.

rosevelt. 1973. "slaves everywhere"

as general terms,  indian territory,  the indian territories, or  indian country  describe an evolving land area set aside by the  united states government  for the relocation of  native americans  who held  aboriginal title  to their land. in general, the tribes ceded land they occupied in exchange for  land grants  in 1803. the concept of an indian territory was an outcome of the 18th- and 19th-century policy of  indian removal. after the  civil war(1861–1865), the policy of the government was one of  assimilation.