{"id":4849,"canonical_url":"https://www.kudos365.com/today-in-history/events/1914ce-apr-20--4849","name":"1914 CE, April 20","year":1914,"era":"CE","month":4,"day":20,"url":"https://www.kudos365.com/today-in-history/events/1914ce-apr-20--4849","iso-date":"1914-04-20","precision":"year-month-day","description":"\u003cp\u003eThe Colorado National Guard and guards from the Rockefeller-owned ,Colorado Fuel and Iron Company, attacked a tent colony of striking miners on April 20, 1914, who were demanding better wages, safety, and union recognition at Ludlow, Colorado. After a 14 hour battle killed 20 to 25 people, including 2 women and 11 children.\u003cbr\u003e\u003c/p\u003e","additional_details":"\u003cp\u003eThe massacre led to a \"Ten-Day War\" of revenge attacks by miners across the region, which ended only when President Woodrow Wilson ordered federal troops to intervene.The strike failed, the outcry against the \"Ludlow Massacre\" helped fuel the labor movement and led to long-term labor reforms. The United Mine Workers of America (UMWA) erected a monument to the victims at the site, which was dedicated in 1918. \u003ca href=\"https://www.zinnedproject.org/news/tdih/ludlow-massacre/\"\u003eMore\u003c/a\u003e\u003c/p\u003e","photo":"","created_at":"2026-04-20T16:12:29-07:00","updated_at":"2026-04-20T16:46:21-07:00","breadcrumbs":{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"April History","item":"https://www.kudos365.com/today-in-history/april"},{"@type":"ListItem","position":2,"name":"April 20","item":"https://www.kudos365.com/today-in-history/april-20"}]},"schema":{"@context":"https://schema.org","@type":"Thing","@id":"https://www.kudos365.com/today-in-history/events/1914ce-apr-20--4849#eventK365","name":"1914 CE, April 20","headline":"The Colorado National Guard and guards from the Rockefeller-owned ,Colorado Fuel and Iron Company, attacked... - 1914 CE","description":"The Colorado National Guard and guards from the Rockefeller-owned ,Colorado Fuel and Iron Company, attacked a tent colony of striking miners on April 20,...","url":"https://www.kudos365.com/today-in-history/events/1914ce-apr-20--4849","additionalType":"HistoricalEvent","inLanguage":"en","datePublished":"2026-04-20T16:12:29-07:00","dateModified":"2026-04-20T16:46:21-07:00","publisher":{"@id":"https://www.kudos365.com/#organizationK365"},"temporalCoverage":"1914-04-20","isPartOf":[{"@id":"https://www.kudos365.com/#websiteK365"},{"@type":"CollectionPage","@id":"https://www.kudos365.com/today-in-history/april","name":"What Happened in April History"},{"@type":"CollectionPage","@id":"https://www.kudos365.com/today-in-history/april-20#pageK365","name":"What Happened on April 20"}]}}