The Lawrence textile strike was a strike of immigrant workers in Lawrence, Massachusetts in 1912 led by the Industrial Workers of the World (IWW). Prompted by a two-hour pay cut corresponding to a new law shortening the workweek, the strike spread rapidly through the town, growing to more than twenty thousand workers and involving nearly every mill in Lawrence. The strike united workers from more than 40 different nationalities. Carried on throughout a brutally cold winter, the strike lasted more than two months, defying the assumptions of conservative trade unions within the American Federation of Labor (AFL) that immigrant, largely female and ethnically divided workers could not be organized. In late January, when a bystander was killed during a protest, IWW organizers Joseph Ettor and Arturo Giovannitti were arrested on charges of being accessories to the murder.