No, it is false that once King Hammurabi had conquered Babylon, he isolated himself and his territory from the rest of Mesopotamia, since he was actually one of the most "active" kings of his day in that he injected himself into the affairs of surrounding territories.
Answer:
Louisiana Purchase: The Land Deal of the Millennium. For a mere $15 million, Thomas Jefferson doubled the size of the United States, buying 800,000 square miles from the French that stretched from the Mississippi River to the Rocky Mountains.
