Kingdoms and empires in West Africa traded with

How did the united states surprise other delegates at the washington naval conference in 1921?

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?  

Who was the first explorer to sail all the way down the mississippi river