Tweed became a member of the Odd Fellows and the Masons, and joined a volunteer fire company, Engine No. 12. In 1848, at the invitation of state assemblyman John J. Reilly, he and some friends organized the Americus Fire Company No. 6, also known as the "Big Six", as a volunteer fire company, which took as its symbol a snarling red Bengal tiger, a symbol which remained associated with Tweed and Tammany Hall for many years. At the time, volunteer fire companies competed vigorously with each other; some were connected with street gangs and had strong ethnic ties to various immigrant communities. The competition could be so fierce that buildings would sometimes burn down while the fire companies fought each other. Tweed became known for his ax-wielding violence, and was soon elected the Big Six foreman. Pressure from Alfred Carlson, the chief Engineer, got him thrown out of the crew, but fire companies were also recruiting grounds for political parties at the time, and Tweed's exploits came to the attention of the Democratic politicians who ran the Seventh Ward, who put him up for Alderman in 1850, when Tweed was 26. He lost that election to the Whig candidate Morgan Morgans, but ran again the next year and won, garnering his first political position.