evidence: Democracy & Human Rights [...] UN & Other International Organizations [...] This volume is part of a subseries of volumes of the Foreign Relations series that documents the foreign policy decision making of the administration of President Ronald Reagan. This volume addresses the administration’s response to the crisis and 1982 war between Argentina and the United Kingdom over the South Atlantic island territories of the Falkland (Malvinas) Islands, South Georgia, and the South Sandwich Islands. It charts the development of the Anglo-Argentine sovereignty dispute which, from the U.S. perspective, was transformed by the Argentine landings on the Falklands (Malvinas) and South Georgia in March–April 1982 from a persistent, though peripheral, boundary issue to a formidable diplomatic challenge, with geopolitical implications that threatened to transcend the narrow geography of the South Atlantic. This violent clash between a powerful, if problematic, regional partner and one of the United States’ closest allies, prompted a further clash within the U.S. foreign policymaking establishment as administration officials balanced the costs of the conflict for U.S. interests in the Western Hemisphere against the risks of undermining the Western Alliance.