The United Mine Workers of America (UMWA) had won a sweeping victory in the 1897 strike by the soft-coal (bituminous coal) miners in the Midwest, winning significant wage increases. It grew from 10,000 to 115,000 members. A number of small strikes took place in the anthracite district from 1899 to 1901, by which the labor union gained experience and unionized more workers. The 1899 strike in Nanticoke, Pennsylvania, demonstrated that the unions could win a strike directed against a subsidiary of one of the large railroads.