The Antarctica Service Medal (ASM) was established by the United States Congress on July 7, 1960 under Public Law 600 of the 86th Congress. The medal was intended as a military award to replace several commemorative awards which had been issued for previous Antarctica expeditions from 1928 to 1941. The following commemorative medals were declared obsolete, following the creation of the Antarctica Service Medal. * Byrd Antarctic Expedition Medal * Second Byrd Antarctic Expedition Medal * United States Antarctic Expedition Medal