10 Ruthless Gangs Who Dared to Stand Up to the Mafia

Why Criminal Gangs Challenged Mafia Power

Money was usually the match that lit the fuse. Prohibition created an enormous illegal market for alcohol, allowing criminal groups to transform neighborhood rackets into sophisticated regional businesses. Bootleggers needed suppliers, warehouses, trucks, political protection, corrupt police contacts, and armed crews. That created fortunes worth fighting over.

The National Archives notes that organized syndicates supplied speakeasies in cities from Los Angeles to New York, while the Library of Congress describes Chicago’s illegal alcohol trade as a catalyst for an infamous decade of gang warfare. In other words, Prohibition did not invent organized crime, but it gave criminals a nationwide expansion pack.

1. The North Side Gang

Chicago’s most famous anti-Capone rival

No organization challenged Al Capone’s Chicago Outfit more openly than the North Side Gang. Led at different times by Dion O’Banion, Hymie Weiss, Vincent Drucci, and George “Bugs” Moran, the largely Irish and German crew controlled valuable bootlegging territory on Chicago’s North Side.

O’Banion’s murder inside his flower shop in 1924 did not end the rivalry. It escalated it. Weiss and Moran answered with assassination attempts, including a spectacular 1926 attack on Capone’s headquarters that riddled the building with gunfire but somehow missed its primary target. Capone, apparently protected by luck and very sturdy furniture, survived.

The conflict culminated in the St. Valentine’s Day Massacre on February 14, 1929, when seven North Side members and associates were shot inside a garage by attackers widely believed to be connected to Capone. Moran escaped because he arrived late. The massacre weakened his organization, although it also intensified federal attention on Chicago’s gangsters.

2. Spike O’Donnell’s South Side Gang

The bootlegger who refused to disappear

Edward “Spike” O’Donnell led another Irish organization competing in Chicago’s crowded illegal beer market. His South Side gang fought the Saltis-McErlane organization, Capone-connected forces, and other crews attempting to monopolize brewing and distribution.

O’Donnell’s men lacked Capone’s wealth and political reach, but they refused to surrender their territory quietly. Chicago’s “Beer Wars” became a confusing collection of ambushes, shifting partnerships, revenge killings, and temporary truces. Yesterday’s business partner could become tomorrow’s target before lunch.

WTTW’s history of the conflict describes hundreds of gangsters being killed as Capone’s organization, the North Side Gang, and numerous smaller groups battled for control. O’Donnell survived repeated attempts on his life and eventually left Chicago’s criminal spotlight, an unusually sensible career move in an industry where retirement parties often took place at cemeteries.

3. The Navy Street Camorra

Brooklyn’s Neapolitan challenge to the Morello Mafia

Before New York’s Five Families emerged in their familiar form, the Sicilian Morello organization faced a serious rival from Brooklyn. The Navy Street Gang was a Neapolitan Camorra faction operating near the Brooklyn Navy Yard under leaders including Alessandro Vollero and Leopoldo Lauritano.

Initially, the Camorra groups cooperated with the Morellos. That arrangement collapsed when disputes erupted over gambling operations, tribute payments, and control of downtown Manhattan rackets. In 1916, Navy Street figures participated in the ambush of Morello boss Nicholas Terranova and his associate Charles Ubriaco after inviting them to what appeared to be a peace meeting.

For a brief period, the attack threw the Sicilian organization into confusion. However, Camorra member Ralph Daniello later provided extensive testimony to police. The resulting prosecutions dismantled much of the Navy Street organization by 1918. The gang had dared to challenge an early Mafia family, but internal betrayal accomplished what its rivals could not.

4. The Coney Island Camorra

A restaurant-based empire with territorial ambitions

The Coney Island Camorra operated alongside the Navy Street group but maintained its own leadership and rackets. Boss Pellegrino Morano reportedly conducted business from the Santa Lucia restaurant, proving that a pleasant dining room does not guarantee pleasant management.

Morano hoped to unite or coordinate New York’s Italian criminal factions while gaining access to lucrative Manhattan operations. When cooperation with the Morellos failed to produce the expected rewards, his faction joined the assault against them.

The Camorra’s attack on the Morello leadership was bold and initially effective. Yet the organization lacked the Mafia’s cohesion. Its factions were loosely connected, and once informants began explaining nearly every secret to investigators, the entire structure collapsed. Morano and other leaders received long prison sentences, clearing the way for Sicilian groups to dominate New York’s Italian underworld.

5. Egan’s Rats

St. Louis enforcers who battled a Sicilian faction

Egan’s Rats began as an Irish-American political and street organization in St. Louis before expanding into robbery, bootlegging, labor intimidation, and election violence. By the early 1920s, they were one of several major groups competing for the city’s illegal liquor trade.

Among their rivals were the Green Ones, a Sicilian gang associated with the Giannola brothers and Alphonse Palazzolo. The Green Ones were an early foundation of what became St. Louis’ Italian-American Mafia structure. Conflict between the organizations included killings, hijackings, and retaliation over liquor routes.

Egan’s Rats possessed experienced gunmen and significant political connections, making them too powerful to intimidate easily. Nevertheless, federal convictions and internal conflict sent many members to prison by the middle of the decade. Once the Rats weakened, the Green Ones and other groups rushed to seize their abandoned territory.

6. The Cuckoo Gang

The St. Louis crew that survived a Mafia war

The Cuckoos were another multiethnic St. Louis gang that resisted the Green Ones during Prohibition. Unlike groups that fired a few shots and reconsidered their life choices, the Cuckoos remained engaged through a sustained series of attacks and counterattacks.

Police attributed at least 13 murders and numerous woundings to the conflict between the Cuckoos and the Sicilian faction by 1926. The Cuckoos inflicted serious casualties and survived long enough for negotiations to become necessary. A temporary truce reportedly reduced the bloodshed, although stability in the Prohibition underworld was generally as reliable as a paper umbrella.

The Cuckoos did not eliminate organized crime in St. Louis, but they prevented the Green Ones from achieving an immediate monopoly. Their resistance demonstrates that early American Mafia groups often had to negotiate with, absorb, or destroy powerful local competitors before claiming citywide authority.

7. The Lanzetta Brothers

Philadelphia bootleggers who targeted a made man

The Lanzetta brothers operated a violent bootlegging, gambling, prostitution, and narcotics network in South Philadelphia during the 1920s and 1930s. Their organization competed with Jewish racketeers, independent bootleggers, and members of Philadelphia’s emerging Sicilian crime family.

Their most direct challenge came in August 1925, when Leo and Ignatius Lanzetta were linked to the killing of Joseph “Joe Bruno” Dovi, a bootlegger and made member of the Philadelphia Mafia. Four days later, Leo Lanzetta was shot outside a barbershop in an apparent retaliation.

The brothers continued operating, but violence and prosecutions steadily dismantled their network. Several were murdered, one was found decapitated, and others were imprisoned or driven from Philadelphia. The Lanzettas proved they were willing to attack Mafia members directly; they also demonstrated why doing so rarely improved a gang’s long-term prospects.

8. Mickey Cohen’s Gang

Los Angeles’ flamboyant resistance to Jack Dragna

After Benjamin “Bugsy” Siegel was murdered in 1947, Mickey Cohen took control of much of Siegel’s Los Angeles gambling and bookmaking network. That placed Cohen in conflict with Jack Dragna, the head of the city’s established Italian-American crime family.

Cohen was Jewish, independent, publicity-loving, and remarkably difficult to kill. Dragna’s faction allegedly backed numerous attempts to remove him during the so-called Sunset Strip wars. In 1950, attackers placed approximately 30 sticks of dynamite beneath Cohen’s Brentwood home. The explosion damaged the house but failed to kill him.

Cohen surrounded himself with armed guards, cultivated reporters, and publicly mocked enemies who preferred operating quietly. His criminal organization survived the Mafia’s attacks, but tax prosecutions eventually accomplished what bombs and bullets had not. Cohen went to federal prison, proving once again that accountants can be more dangerous to gangsters than gunmen.

9. Mickey Spillane’s Hell’s Kitchen Gang

The Irish mobster who refused Mafia participation

During the 1960s and 1970s, Mickey Spillane controlled gambling, loansharking, union influence, and waterfront rackets in Manhattan’s Hell’s Kitchen. He maintained a degree of independence from New York’s Italian Mafia families and resisted their attempts to enter his territory.

The greatest dispute concerned construction and labor opportunities associated with Manhattan’s West Side, including the future Jacob K. Javits Convention Center. Spillane reportedly refused to share control with Italian mobsters despite their larger numbers and greater citywide influence.

His resistance triggered deadly consequences. Several top associates were murdered, and Spillane moved his family away from Hell’s Kitchen. He was shot to death in Queens in 1977. His successors, the Westies, eventually formed a profitable alliance with the Gambino familyless a victory parade than an admission that independence had become dangerously expensive.

10. The East Harlem Purple Gang

The “sixth family” that would not consistently follow orders

The East Harlem Purple Gang emerged during the 1970s as an Italian-American narcotics and contract-killing organization. Its members often worked with New York’s Five Families, distributing drugs, collecting debts, and carrying out violent assignments.

However, the gang was not simply a Mafia crew. It operated with considerable independence, ignored territorial expectations, and sometimes competed with established families. Law enforcement officials reportedly feared that its expansion could lead to open warfare with elements of the Bonanno family.

The Purple Gang’s reputation rested on unpredictable violence, including murders associated with small-caliber firearms and dismemberment. Some observers called it New York’s “sixth family,” although it never possessed the formal structure of the Five Families. Its members eventually scattered, entered Mafia organizations, went to prison, or became targets themselves. Independence had allowed the gang to grow, but it also left it without reliable protection when alliances shifted.

Lessons From Studying Gangs That Challenged the Mafia

“Standing up” rarely meant being heroic

Reading about Mafia gang wars can feel like opening a history book written by a screenwriter who had just discovered machine guns. There are colorful nicknames, dramatic ambushes, restaurant meetings, exploding houses, and betrayals timed with theatrical precision. That entertainment value can hide the most important fact: these organizations generally resisted Mafia control because they wanted the same illegal profits for themselves.

The North Side Gang was not defending Chicago from criminal influence. Mickey Cohen was not attempting to introduce ethical management to Los Angeles gambling. The Lanzettas were not neighborhood reformers. They challenged monopolies because they wanted larger pieces of those monopolies.

Local knowledge could temporarily outweigh Mafia size

Smaller gangs frequently survived because they understood their neighborhoods better than outside organizations did. Spillane had relationships with West Side unions and political figures. The Cuckoos knew St. Louis streets and local rackets. The Navy Street Camorra had community connections in Brooklyn that the Manhattan-based Morellos could not immediately duplicate.

This local influence created bargaining power. A Mafia family might possess more members, money, and political reach, yet invading another gang’s territory required information, trusted intermediaries, and reliable local enforcers. Organized crime was not a strategy board where a boss could simply place a small plastic soldier on a neighborhood and declare victory.

Alliances were often more effective than open warfare

The groups that survived longest usually learned when to negotiate. The Westies eventually partnered with the Gambino family. Some Purple Gang members became Mafia associates or made men. Former Camorra figures were absorbed into broader Italian-American criminal networks after their original organizations collapsed.

These outcomes reveal how the American Mafia expanded. It did not always destroy competitors. Sometimes it offered them contracts, protection, introductions, or membership. Cooperation produced money without the noise, police pressure, and funerals generated by a gang war. Even criminals eventually discover that constant ammunition expenses are terrible for quarterly earnings.

Informants and prosecutions decided more wars than gunmen

Many gangs on this list survived assassination attempts only to collapse in court. The Navy Street Camorra fell after an insider testified. Cohen was imprisoned for tax offenses. Federal cases weakened Egan’s Rats and numerous Chicago factions. Later organized crime prosecutions used conspiracy and racketeering laws to attack entire networks rather than individual crimes.

This pattern is one reason underworld victories were often temporary. A gang could remove a rival boss and inherit his territory, but every shooting created witnesses, evidence, frightened associates, and new investigative pressure. Violence solved one immediate problem while ordering three future problems with expedited shipping.

The communities involved paid the real price

Gang histories naturally focus on bosses and gunmen, yet ordinary residents experienced the consequences. Businesses faced extortion. Workers saw unions manipulated. Families lost relatives. Innocent bystanders were wounded or killed during attacks intended for someone else. Corruption weakened trust in police, courts, elections, and city government.

That broader experience prevents the history from becoming a costume drama filled only with fedoras and vintage automobiles. The gangs who stood up to the Mafia were daring, but they were also predatory organizations whose battles spread fear far beyond their membership.

Conclusion

The Mafia’s dominance was never automatic. In Chicago, New York, St. Louis, Philadelphia, and Los Angeles, independent gangs fought established Italian crime families for territory, liquor routes, gambling operations, labor influence, and narcotics markets.

A few embarrassed powerful bosses. Others forced negotiations or preserved their independence for years. Almost none achieved a peaceful ending. Their leaders were murdered, imprisoned, betrayed, absorbed, or pushed aside by newer organizations.

The enduring lesson is not that ruthless gangs could defeat the Mafia through greater brutality. It is that organized crime is unstable by design. Every profitable racket attracts competitors, every alliance contains the possibility of betrayal, and every apparent victory creates another person eager to take control. In the underworld, the top position usually comes with excellent revenue and truly awful job security.