Following the Civil War—and in the wake of the Second Industrial Revolution—Indianapolis experienced tremendous growth and prosperity. In 1880, Indianapolis was the world's third largest pork packing city, after Chicago and Cincinnati, and the second largest railroad center in the United States by 1888.[55][56] By 1890, the city's population surpassed 100,000.[43] Some of the city's most notable businesses were founded during this period of growth and innovation, including L. S. Ayres (1872), Eli Lilly and Company (1876), Madam C. J. Walker Manufacturing Company (1910), and Allison Transmission (1915). Once home to 60 automakers, Indianapolis rivaled Detroit as a center of automobile manufacturing.[57] The city was an early focus of labor organization.[43] The Indianapolis Street Car Strike of 1913 and subsequent police mutiny and riots led to the creation of the state's earliest labor-protection laws, including a minimum wage, regular work weeks, and improved working conditions.[58] The International Typographical Union and United Mine Workers of America were among several influential labor unions based in the city.[43]