Where did America get the labor supply it needed during the late 1800s and early 1900s

In italy, the distance between milan in the north and palermo, sicily, in the south is about 550 miles. in the united states, the distance betweenboston, massachusetts, and savannah, georgia, is about 900 miles. do you think the american revolutionaries of 1776 in the 13 colonies faced some of the same challenges as the patriots who struggled for italian unity in the 1860s?  

Civil liberties in latin america vary. this means that

The northwest ordinance guaranteed three rights for the settlers of the northwest territory. what were they?