Final answer:
Tactical teams are established through unit type codes (UTC) by Major Commands (MAJCOMS) and they execute well-defined plans or objectives.
Step-by-step explanation:
Tactical teams are the type of teams that are established by Major Commands (MAJCOMS) through unit type codes (UTC). These codes determine the size, composition, and equipment of the tactical teams. Tactical teams are used to execute well-defined plans or objectives in various situations, such as law enforcement tactical teams handling hostage situations or military special operations teams.