Trapani crime family was founded by Peter Clemenza and Aldo Trapani after Michael Corleone gave him permission to start their own family when he re-located to Nevada. After Clemenza's death in New York and Aldo's death in Havana, Cuba, his UnderbossDominic took over the family. Their family color is red and their emblem is a red lion on a red outlined white shield.
In 1955, after the assassination of his rivals, Michael Corleone re-located a part of his organization to Nevada to oversee his businesses in Las Vegas and Reno. However, the original Corleone crime family continued it's operations in New York, under the supervision of Peter Clemenza and Aldo Trapani, who got permission to form his own family. Trapani started to suround himself with other strong men, one of whom was Dominic Corleone, who was elevated to the rank of underboss. They immediately continued to expand their rackets and seeking new ways of making money.
In the late 1950s, Trapani's organization supported Michael Corleone's dealings in Cuba with Hyman Roth and the government of Fulgencio Batista. Aldo Trapani and Dominic Corleone made frequent business trips to Havana and were also present at the meeting in late 1958, to celebrate Roth's birthday and to get a piece of his operations. However, after the meeting, president Batista declared his abdication after his forces were defeated by the rebels of Fidel Castro, forcing Michael Corleone, Aldo Trapani and Dominic to flee the country. During a raid by the rebels, Aldo Trapani was killed while arriving at Havana's airport. Shortly after, Michael Corleone made Dominic the new Don of the Trapani crime family.
Back in New York, Dominic was informed that some of his own men joined forces with the Rosato Brothers, who were two former caporegimes who had started their own families, causing an uproar in the criminal underworld. Dominic was given instructions to deal with the matter, and after killing Carmine Rosato and his men, he was called to Florida to help Hyman Roth's organization and to set up new businesses. Under Dominic's ambitious reign the Trapani family expanded quickly, recruiting new men and forming a partnership with Roth and the Manganos. They also started working together with the CIA via their agent Henry Mitchell, who gave information about the status in Cuba. New wars where fought for supremacy with the Almeidas in Cuba and the Granados from Mexico, which were all won. After the assassination of Hyman Roth, Dominic had conquered the position of boss of the Corleone crime family, given way from Michael Corleone, doing flow into Trapani crime family in the Corleone crime family.