here. In 1898, the modern City of New York was formed with the consolidation of Brooklyn (until then an independent city), Manhattan, and outlying areas. Manhattan and the Bronx were established as two separate boroughs and joined with three other boroughs created from parts of adjacent counties to form the new municipal government originally called "Greater New York". The Borough of Brooklyn incorporated the independent City of Brooklyn, recently joined to Manhattan by the Brooklyn Bridge; the Borough of Queens was created from western Queens County (with the remnant established as Nassau County in 1899); and the Borough of Richmond contained all of Richmond County. Municipal governments contained within the boroughs were abolished, and the county governmental functions were absorbed by the city or each borough. In 1914, the New York State Legislature created Bronx County, making five counties coterminous with the five boroughs. The Bronx had a steady boom period during 1898–1929, with a population growth by a factor of six from 200,000 in 1900 to 1.3 million in 1930. The Great Depression created a surge of unemployment, especially among the working class, and a slow-down of growth. On June 15, 1904, over 1,000 people, mostly German immigrant women and children, were killed when the excursion steamship General Slocum caught fire and sank. It is the city's worst maritime disaster. On March 25, 1911, the Triangle Shirtwaist Factory fire in Greenwich Village took the lives of 146 garment workers. In response, the city made great advancements in the fire department, building codes, and workplace regulations. Throughout the first half of the 20th century, the city became a world center for industry, commerce, and communication, marking its rising influence with such events as the Hudson-Fulton Celebration of 1909. Interborough Rapid Transit (the first New York City Subway company) began operating in 1904, and the railroads operating out of Grand Central Terminal and Pennsylvania Station thrived. The city was a destination for internal migrants as well as immigrants. Through 1940, New York was a major destination for African Americans during the Great Migration from the rural American South. The Harlem Renaissance flourished during the 1920s and the era of Prohibition. New York's ever accelerating changes and rising crime and poverty rates were reduced after World War I disrupted trade routes, the Immigration Restriction Acts limited additional immigration after the war, and the Great Depression reduced the need for new labor. The