How did changes in transportation and communication alter the economic landscape during the first half of the nineteenth century? How are current changes in transportation and communication altering the economic landscape today?

Canals and other improvements in transportation allowed goods to reach markets more quickly and cheaply and transformed the more isolated "household economy" into a market revolution which bought and sold goods for profit in sometimes distant markets.

on april 6, 1917, the u.s. joined its allies--britain, france, and russia--to fight in world war i. under the command of major general john j. pershing, more than 2 million u.s. soldiers fought on battlefields in france.