"The Uprising of the Twenty Thousand," the International Ladies' Garment Workers Union Triangle Shirtwaist strike that began September 27, declared officially over by ILGWU; by now 339 manufacturing firms have reached agreements with the union; 13 firms, including Triangle, with 1,100 workers, did not settle.

Posting this now and will look more. Found it with a google of

garment workers strike, usa, uprising of the twenty-thousand, 20,000, 1910