Explain in one to two sentences how us involvement in world war ii represented a shift form isolationism to intervention.

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?  

Concentration camps built by nazis in 1933 initially held

Why are nation-states difficult to create?