Five Mexican-American fathers (Thomas Estrada, William Guzman, Gonzalo Mendez, Frank Palomino, and Lorenzo Ramirez) challenged the practice of Mexican school segregation in the United States District Court for the Central District of California, in Los Angeles. They claimed that their children, along with 5,000 other children of "Mexican" ancestry, were victims of unconstitutional discrimination by being forced to attend separate "schools for Mexicans" in the Westminster, Garden Grove, Santa Ana, and El Modena school districts of Orange County. Mexicans were not in separate schools elsewhere in California.