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Almost 31,000 miles.
slavery
5 northern states had over 2,000 miles of track
please be more specific as to what country you mean
1860 miles
Johnnie Jo Dickenson has written: 'Walker County, Texas 1850-1860 census' -- subject(s): Census, 1850, Census, 1860, Census, 7th, 1850, Census, 8th, 1860, Genealogy, Registers of births
1850 - 1860
for AP USH, the answer is 1850-1860 or just 1860
1860
Dorothy O. Teel has written: '1850 census, Sumter-District, South Carolina' -- subject(s): Census, 1850, Registers of births, Genealogy, Census, 7th, 1850 '1860 census, Clarendon District, South Carolina' -- subject(s): Census, 1860, Registers of births, Census, 8th, 1860, Genealogy
According to the US Census of 1860, the US population grew 35% from its level in 1850. Part of this increase was due to a rise in the slave population. In 1860, approximately 14% of the US were slaves.
There is a lot of major events from 1860-1865. I suggest that you google "major events from 1860-1865".