The American mafia appeared at the beginning of last century, mainly composed of several family gangs, and gradually developed and expanded. Its base camp is in Chicago, but they have their footprints in almost the whole midwest of the United States. In addition to the core members, there are partners and sub-gangs, with long tentacles and many eyes and ears. Since the establishment of the mafia, they have been engaged in various types of criminal activities, with interests as the core goal. At first, they mainly robbed, abducted and sold people and drugs, which became a big worry for the American police.
With the outbreak of World War I and World War II and the subsequent financial crisis in the United States, the American police did not have the energy to deal with the mafia at that time, which led to the rapid development of the mafia. During the period of 1943, the American police chased the mafia, and after some cleaning, they put many high-level mafia members in prison. But these mafia people have a wide network of contacts, excused themselves in various ways, and were released from prison in just three years. Since then, the mafia situation has become more secretive. In the 1960s and 1970s, the mafia reached its peak, with tens of thousands of core members. Large-scale money laundering began, and even gradually invaded Hollywood industry. At that time, many singers and movie stars had underworld backgrounds.
In 2005, the American police finally made up their minds to thoroughly investigate and clean up the American mafia. At that time, all the mafia leaders were put in prison. Since then, the strength of the American mafia has weakened, and its actions are not as unbridled as in the last century. Many actions turned underground and became more secretive. In this case, for the American police, it is of little significance to clean it again.