Four convicted <a href="https://en.wikipedia.org/wiki/Anarchism_in_the_United_States" id="mwqA" rel="mw:WikiLink" title="Anarchism in the United States">anarchists</a> were executed as a result of the <a href="https://en.wikipedia.org/wiki/Haymarket_affair" id="mwqQ" rel="mw:WikiLink" title="Haymarket affair">Haymarket affair</a>.