Tammany Hall, also known as the Society of St. Tammany, the Sons of St. Tammany, or the Columbian Order, was a New York City political organization founded in 1786 and incorporated on May 12, 1789, as the Tammany Society. It was the Democratic Party political machine that played a major role in controlling New York City and New York State politics and helping immigrants, most notably the Irish, rise up in American politics from the 1790s to the 1960s.