Describe how the use of german u-boats forced the allies to change their tactics, explain what the allies did to deal with the u-boats.

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?  

When conducting research for forming a hypothesis, which practice should historians follow?

The difference between ptolemy iii and ptolemy xiv