The Tule Lake Relocation and Segregation Center operated between 1942 and 1946 as one of ten federal installations for internment of Japanese and Japanese-Americans during World War II. The Tule Lake site was located in Modoc County, California, near the California-Oregon border, about forty miles southeast of Klamath Falls, Oregon, and 10 miles south of the town of Tulelake. The site size was 1,110 acres. At its peak, more than 18,000 people of Japanese ancestry from western states who had been labeled "disloyal" were detained there. Portions of the site later became private property or state property or remained under federal government control. The Tule Lake Committee and others conducted efforts to preserve the site for many years. The site was designated a National Historic Landmark in 2006. In December 2008 the Tule Unit of the World War II Valor in the Pacific National Monument was created by Presidential proclamation.