After Pearl Harbor, nearly 112,000 Japanese-American citizens came under suspicion regarding their loyalty to the United States amid a wave of hysteria. President Franklin D. Roosevelt established the War Relocation Authority by Executive Order No. 9066 on May 18, 1942, empowering it to relocate and intern people of Japanese ancestry living on the West Coast. Under that authority, the Rohwer relocation center was established on September 18, 1942, and the first of some 8,500 Japanese-Americans arrived that day for internment. In February 1943, the U.S. Army created the 100th Battalion and the 442nd Regimental Combat Team, an all Nisei unit whose members served with great valor in the European theater while their families remained interned; the unit fought at Salerno, Anzio, and Cassino and took part in the rescue of the Texas "lost battalion," and the 100th Battalion and 442nd Regiment were remembered as the most highly decorated of all units during World War II. During the internment years, thousands of Japanese-Americans also volunteered or were drafted for military intelligence operations in the Pacific War with Japan, and information made public three decades after the war described their valor and secret contribution to victory. The last Japanese-American left Rohwer on November 30, 1945, ending three and a half years of internment. The dead from Rohwer included Japanese-American servicemen who gave their lives while serving their country in World War II, and Sam Yutaka Yada was honored for work in Arkansas from 1942 to 1991 toward national recognition and the preservation and restoration of the cemetery.