John Morrissey Although the character of Amsterdam Vallon, played by Leonardo DiCaprio, was greatly a work of fiction, it can also be argued that the character of Amsterdam in the movie Gangs of New York was very loosely based on the historical figure of John Morrissey. John was born in Templemore, County Tipperary, Ireland in 1831. Two years later, his parents immigrated to the United States and settled in Troy, New York. Like William Poole, he was well known as a highly skilled boxer, gambler, and gang leader of the Dead Rabbits. Unlike the movie, Morrissey's father was not killed by Bill The Butcher and revenge was not his true motif in going head to head with The Butcher. In reality, he became Poole's adversary when he was hired to prevent Poole from seizing ballot boxes and rigging an election. Morrissey and the Dead Rabbit gang were rewarded by Tammany Hall to open a gambling house without police interference. Poole and Morrissey would go toe-to-toe, but not in an epic gang battle. The two fought in a boxing match, in which Morrissey lost. A few weeks later, Lew Baker, a friend of Morrissey, shot and fatally wounded Bill the Butcher at a saloon on Broadway in 1855. Morrissey was a champion boxer, but when he retired, he ran for Congress and was backed by Tammany Hall. He ended up serving two terms (1867-1871) in the House for the 40th and 41st Congress, representing the 5th Congressional District. As a Congressman, Morrissey always looked out for the interests of the Irish. Much like William Poole was an enforcer of The Native American Party, John Morrissey and his Dead Rabbits were often used an enforcers for the Democratic Party and the muscle for the leader of Tammany Hall - William "Boss" Tweed. .