What was the relationship between the Venetians and the Ottomans? How was their relationship mutually beneficial?

Why are primary sources important when studying historical events

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?  

What battle in the civil war was known as the bloodiest war ?