In the early 1900s, New York City’s shirtwaist (women’s blouse) industry grew rapidly, relying heavily on young immigrant labor. Many shops used long hours, low pay, and unsafe, crowded workrooms—conditions commonly called “sweatshops.” These pressures set the stage for large-scale organizing among garment workers.
By fall 1909, the International Ladies’ Garment Workers’ Union (ILGWU) Local 25 was trying to organize shirtwaist makers and curb shop-floor abuses. After earlier shop-level stoppages and firings, Local 25’s leaders concluded that only a general strike could shut down production across the industry. Planning moved quickly from scattered disputes to a coordinated walkout.
On November 22, 1909, thousands gathered at Cooper Union’s Great Hall to debate whether to launch a general strike. After hours of speeches urging caution, garment worker Clara Lemlich demanded action and called for a walkout. The crowd backed the motion, creating the spark for what became known as the “Uprising of the 20,000.”
Starting the next morning, tens of thousands of workers left their machines and joined picket lines. Most participants were young women, many of them Jewish immigrants, and the strike quickly became one of the largest women-led labor actions in U.S. history. The walkout aimed to force manufacturers to negotiate over hours, wages, and shop rules.
The Women’s Trade Union League (WTUL) supported the strikers by helping fund relief, providing meeting space, and assisting with bail and legal defense for arrested picketers. WTUL members also joined picket lines and organized mass events to raise public awareness about sweatshop conditions. This cross-class alliance helped keep the strike visible and sustained during a harsh winter.
Police arrests and court penalties became a major feature of the strike. Large numbers of picketers were arrested, and the costs of bail and fines drained resources and exhausted many workers. The harsh treatment also drew sympathetic attention from parts of the public and reform networks.
As the stoppage continued, many smaller manufacturers negotiated agreements, allowing some workers to return to improved jobs. The largest firms, organized through employer associations, resisted key union demands—especially the idea of a “closed shop” (requiring union membership). This split created a longer, more difficult endgame focused on the biggest employers.
On February 15, 1910, the general strike ended after roughly eleven weeks, with many firms signing contracts. Gains commonly included shorter hours (notably a 52-hour week), paid holidays, and rules limiting discrimination against union supporters. The settlement fell short of full union control in every shop, but it demonstrated that immigrant women workers could win concrete improvements.
Not all employers accepted union terms, and Triangle Shirtwaist became a well-known holdout. Even as other shops reached agreements, Triangle workers returned without strong union recognition and with unresolved safety and workplace-control issues. This left a major, high-profile factory outside the strike’s main protections.
After the strike, union membership expanded sharply among shirtwaist makers, and Local 25 grew into a much larger organization. The uprising also challenged assumptions that women workers were “unorganizable,” elevating organizers and speakers who had emerged during the walkout. These shifts helped shape future garment-industry union campaigns.
On March 25, 1911, a fire at the Triangle Shirtwaist Factory killed 146 workers. Many victims were young immigrant women, and the disaster became a national symbol of dangerous factory conditions and weak protections. The fire intensified demands for workplace safety regulation and enforcement.
In the wake of the Triangle fire, public attention and reform pressure pushed government and labor leaders toward stronger oversight of factory conditions. Investigations and new rules targeted fire hazards, exits, and other safety standards in industrial workplaces. This marked a shift from short-term shop agreements toward broader, state-backed worker protections—one of the enduring outcomes linked to the Uprising of the 20,000 era.
Uprising of the 20,000 — New York Garment Strike (1909)