<span>Human societies and their interactions have led to divisions of territories into countries and various other subdivisions. While these divisions are at their root artificial, they are important to geographers in the discussion of interactions of various populations</span>
Although The Battle of
Hampton Roads was not won by either side, the importance it had, was
that it was the first battle of armored ships in history, and also
included a development of notable war technologies: such as the rotating
turret of the USS Monitor. <span>The great battle between these battleships lasted for hours, and none was able to destroy the other; finally the USS Monitor made the ironclad Virginia retreat, unable to do real damage. <span>This
initiated a new form of maritime war, using ironclads, that soon
would be much more advanced, like the ironclads or destroyers ships of the first
world war.</span></span>
Astronomy mathematics medicine and physics
The Great Migration, or the relocation of more than 6 million African Americans from the rural South to the cities of the North, Midwest and West from 1916 to 1970, had a huge impact on urban life in the United States.
