Why did the code talkers stay in the military after the war was over?

 1942 dawned, World War II was not going well for America and her Allies. Japanese carrier-borne bombers and fighters had crippled the U.S. Navy’s proud Pacific Fleet at Pearl Harbor on December 7, 1941; attacked American bases in the Philippines and on Guam; and were intent on seizing other island bases in the south and central Pacific. In Europe, France had fallen to Germany’s blitzkrieg, and stalwart Britain was still staggering from the Nazis’ relentless nighttime bombing during the previous year.