This report highlights the core characteristics of the American Reserve System with a comparative analysis of reserve forces in the Federal Republic of Germany, the United Kingdom, and Israel. The analysis adopts a case-based approach and uses qualitative binary methodology. The following are the core elements of the social organization of American reserve components: (1) No other reserve system requires as much training time for its members; (2) no other reserve system relies on reservists for basic full-time support; (3) no other reserve system has a well developed career path (with a corresponding professional military education system) leading to senior command and staff positions; and (4) in no other reserve system do reservists have such limited real vacation time. The effect of these conditions is that the American reserves, in comparison with those in other Western countries, are characterized by greater conflict between reserve duties and family obligations and, most especially, between reserve duties and civilian employment responsibilities. Long-term policy changes to improve reserve force must take this into account.