The changes that have occurred in the Western world in recent decades have produced many transformations in society. One of the areas that has been most openly affected is the military institution, derived from the redefinition of the State, new non-combat missions assigned to the armed forces, the continuation of traditional militaries and the deepening convergence of civilians and the military. Based on the book "The Postmodern Military" by Moskos, Segal and Allen, the author analyzes in this article, the impact that postmodernity is having on the military arena in Latin America and how the military is acting or reacting to this. In addition, the author analyzes the organizational changes and recommends some skills or traits that the professionals in the armed forces should acquire in the face of this era of change.