Final answer:
MAJCOMs are responsible for establishing Unit Type Codes that define the size, composition, and equipment of military teams, which are essential for mission planning and readiness.
Step-by-step explanation:
The Major Command (MAJCOM) in the military structure is responsible for establishing Unit Type Codes (UTCs). These codes are critical for defining the specific characteristics and capabilities of military teams. A UTC defines the size, composition, and equipment necessary for an operational team, which is essential for planning missions and ensuring that teams are prepared for their specific tasks in operations. The codes help streamline the organization and deployment of military assets and personnel, making them a cornerstone of military logistics and operational readiness.