Colorado was another area with extensive Klan activity. During World War I, Colorado companies sought to fill labor gaps left by soldiers through recruiting refugees of the Mexican Revolution (who had arrived in the U.S. in large numbers during the 1910s). As labor recruiters paid to relocate large numbers of refugees to Colorado, white residents became increasingly enraged at the presence of the "radical aliens." During the First Red Scare of 1920, significant numbers of white Coloradans joined nativist and "one hundred percent American" organizations. Despite these sentiments, corporations continued to recruit Mexicans. In 1921, John Galen Locke harnessed the intensifying anti-Mexican feelings and organized the KKK in Colorado. By 1925, the KKK had emerged as the dominant political force in Colorado, running on campaigns of law and order and anti-Mexicanism. The KKK deliberately held rallies in cities with large Mexican neighborhoods.