The Ladies Auxiliary of the International Union of Mine Mill and Smelter Workers
The Ladies' Auxiliaries (LA) of the International Union Mine Mill and Smelter Workers (IUMMSW) were women's organizations in the United States of America and Canada associated with local units of the IUMMSW. Women active in the Auxiliaries were the wives, daughters, sisters, and mothers of IUMMSW members. Women's organizations associated with trade unions in male-dominated industries have played a central role in labour struggles since the end of the 19th century.