The document discusses teams and team building in the U.S. Army. It defines a team as a group that works together to accomplish missions and tasks. It describes two types of teams - internal teams made up of members from the same organization, and external teams with members from different organizations. The document outlines the roles of team leaders and members. It then discusses the Army's team building process, which includes three stages: formation, enrichment, and sustainment. Each stage aims to improve the quality of the team and their ability to work together effectively. Characteristics of effective teams and indicators of effective versus ineffective teams are also provided.