 In March 1969, a convention hosted by Rodolfo Gonzales's Crusade for Justice was held in Denver and the "Plan Espiritual de Aztlán" was adopted as a manifesto for the movement.The Crusade for Justice was instrumental in bringing attention to the plight of Mexican-Americans living in Denver and laid the ground work for Hispanics to be in city government.After World War II, oil and gas companies opened offices in Denver because of its proximity to the mountains and the energy fields contained within.