Why did president theodore roosevelt use the corollary in the dominican republic?

How were japan's actions before and during world war 2 compare with germany's actions over the same period

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?  

Why did federalists fear the louisiana purchase? what did they think would happen?