After two unknown assassins attacked Dominic and Fredo Corleone at Dominic's home in Miami, Fredo convinced him that they were sent by Mangano. In response to this, Dominic attacked Mangano at Global Storage, Mangano's only racket in the United States. He succeeded in taking it over. However, Mangano was outraged and, as an act of revenge, he took over a series of Corleone businesses. The takeover of Global Storage was the start of the Trapani - Mangano War.