What is the difference between the production and the distribution of an item? - apex

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?  

What from the columbian exchange had perhaps the biggest impact on the world?

What factor aided the russians in defeating napoleon's troops?