The war also attracted tens of thousands of workers from across the country, as the greatly expanded wartime production quickly exhausted local labor pools. Of the five million rural southern African-Americans migrating to the industrial North and West during the second wave of the Great Migration, an estimated 45,000 went to the Pacific Northwest, of which 10,000 moved to Seattle. Most African American workers came to Seattle as shipyard employees, and by summer 1942, the National Youth Administration brought to the city the first group of blacks to work for Boeing. By war's end, 4,078 (7 percent) of the 60,328 shipyard workers in Seattle were African Americans. AA's also found work as non-military government employees. Of 18,862 federal employees in Seattle in 1945, 1,019 (5 percent) were black. Moreover, the 4,000 black soldiers and sailors stationed at Fort Lawton in Seattle and other military installations nearby contributed to the new employment diversity of the African American population. As a result, between 1940 and 1950, Seattle's black population grew 413 percent, from 3,789 to 15,666. The newcomers became permanent residence, building up black political influence, Strengthening civil rights organizations Such as the NAACP, calling for antidiscrimination legislation. On the negative side, racial tensions increased, both black and white residential areas deteriorated from overcrowding, and inside the black community there were angry words between "old settlers" and recent arrivals for leadership in the black communities.