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| Founded by | Unknown |
|---|---|
| Founding location | South Boston, Massachusetts |
| Years active | 1950s-1970s |
| Territory | South Boston, Massachusetts |
| Ethnicity | Irish-American |
| Membership (est.) | 40-50 |
| Criminal activities | Racketeering, armed robbery, auto theft, burglary, extortion, loansharking, illegal gambling, murder |
| Allies | The Winter Hill Gang |
| Rivals | The Killeen Gang |
The Mullen Gang was an Irish-American gang operating in Boston.[not verified in body]
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