Prohibition: America's War on Alcohol 1920-1933 · 2 Aug 2026 · 13 min

The Valentine's Day Massacre: When Capone Went Too Far

Seven men lined up against a garage wall in Chicago, shot in cold blood — and Prohibition's organised crime problem could no longer be ignored. This is the St. Valentine's Day Massacre and what it revealed about Al Capone's grip on a city where the law had already surrendered.

Prohibition: America's War on Alcohol 1920-1933
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The Valentine's Day Massacre: When Capone Went Too Far

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What's covered

The Question That Hung Over Chicago

Seven men walked into a garage on North Clark Street on the morning of February fourteenth, nineteen twenty-nine. None of them walked out.

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The City Capone Built

To understand February fourteenth, you need to understand what Chicago had become by nineteen twenty-nine. The Volstead Act had been in force for nine years.

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The North Side Problem

Capone's main rival in Chicago was the North Side Gang. They'd been in conflict for years.

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North Clark Street, Seven A.M.

The setup was elegant in its simplicity. Someone lured a group of Moran's men to a garage at two one two two North Clark Street on the morning of Valentine's Day.

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Why This Was Different

Chicago's newspapers had covered gang violence for years. Editors and readers had developed a kind of tolerance for it.

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The Capone Question

Capone was in Florida when it happened. He made sure of that.

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The Public Reckoning

The massacre shifted public opinion in ways that are hard to quantify precisely but easy to trace in the record. Before Valentine's Day nineteen twenty-nine, there was still a meaningful constituency for Prohibition.

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What Prohibition Had Built

Here's the broader frame that the massacre forces into view. The Volstead Act was designed to reduce crime.

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Eliot Ness and the Limits of Enforcement

Eliot Ness and his Untouchables were working in Chicago during this period, targeting Capone's bootlegging operations. The team was notable specifically because they couldn't be bribed.

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The Beginning of the End

The St. Valentine's Day Massacre happened in nineteen twenty-nine.

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What the Massacre Still Tells Us

The St. Valentine's Day Massacre is remembered as a sensational crime.

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