His set of laws were called the Napoleonic Code.
Even after the unification, that gradually happened between 1815-1871, the conflict still continued mainly because of quite major regional and ethnic differences. Since Italy was separated for quite a long time, different traditions, views on politics, and much more appeared within these societies. If you take a closer look at the image below, you will see how many different societies lived separately. You could only imagine how diverse that area was.
The Judiciary Act of 1801 expanded the Federal Court System.
Within the twelve years since the federal judiciary was established, Congress approved a reorganization of the nation's court system, resulting to the significant expansion of the federal jurisdiction.
The Judiciary Act of 1801 decreased the number of justices in the Supreme Court from six to five justices and eliminated their duties of doing circuits around the country. Instead, the Act created sixteen judgeships for the six judicial circuits. The US circuit courts, where new judges will preside, gained jurisdiction over all cases arising under the Constitution and acts of the United States.