What is the meaning of the expression "all roads lead to rome"?

What caused the united states to side with britain during world war i?

Government powers not provided to the national government in the us constitution but are rather given to the states by the 10th amendment is called?

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?