was suppressed by Frick. The economy recovered by 1897. In May 1899, three hundred Homestead workers formed an AA lodge, but Frick ordered the Homestead works shut down and the unionization effort collapsed. De-unionization efforts throughout the Midwest began against the AA in 1897 when Jones and Laughlin Steel refused to sign a contract. By 1900, not a single steel plant in Pennsylvania remained unionized. The AA presence in Ohio and Illinois continued for a few more years, but the union continued to collapse. Many lodges disbanded, their members disillusioned. Others were easily broken in short battles. Carnegie Steel's Mingo Junction, Ohio, plant was the last major unionized steel mill in the country. But it, too, successfully withdrew recognition without a fight in 1903. AA membership sagged to 10,000 in 1894 from its high of over 24,000 in 1891. A year later, it was down to 8,000. A 1901 strike against Carnegie's successor company, U.S. Steel, collapsed. By 1909, membership in the AA had sunk to 6,300. A nationwide steel strike of 1919 also was unsuccessful. The AA maintained a rump membership in the steel industry until its takeover by the Steel Workers Organizing Committee in 1936. The two organizations officially disbanded and formed the United Steelworkers on May 22, 1942. In 1999 the Bost Building in downtown Homestead, AA headquarters throughout the strike, was designated a National Historic Landmark. It is used as a museum devoted not only to the strike, but also the steel industry in the Pittsburgh area. A railroad bridge over the Monongahela River near the site of the battle is named Pinkerton's Landing Bridge in honor of the dead. Two sites were each designated with a Pennsylvania state historical marker: the site where Pinkerton attempted to land, and the two adjoining cemeteries of St. Mary's and Homestead where are buried the remains of six of the seven Carnegie Steel Company workers that were killed. The Pinkerton landing site was also named a Pittsburgh History and Landmarks Foundation Historic Landmark. Modern site The pump house where the gunfight occurred remains as a museum and meeting hall. There are several historical markers as well as a metal commemorative sign with the US Steel logo that reads "In honor of the workers". See also Battle of Blair Mountain Battle of Matewan Frick Coke Company strike of 1891 Frick mine explosion Johnstown Flood of 1889 List of worker deaths