At the time of the launch of Operation Dixie, CIO membership in the Southern United States stood at about 225,000 — a figure excluding the 100,000 Southern members of the United Mine Workers of America, a union which had disaffiliated from the CIO federation in 1942. About 42,000 of these were represented by the CIO-affiliated Textile Workers Union of America. Other important CIO unions in the region included the United Cannery, Agricultural, Packing, and Allied Workers of America (UCAPAWA), the United Steelworkers of America (USWA), as well as the Oil Workers' Union, Shipbuilding Workers, and Rubber Workers' Union.