Final answer:
A Force Package is a grouping of combat and support units, along with necessary supplies and personnel, to sustain forces.
Step-by-step explanation:
A grouping of combat and Expeditionary Combat Support UTCs with accompanied supplies and personnel necessary to sustain forces is known as a Force Package.
A Force Package is a temporary organizational structure that brings together units and resources needed to carry out specific operational missions. It typically consists of combat units, support units, and necessary supplies and personnel.
For example, during a military operation, a Force Package might be formed by combining infantry units, artillery units, and logistics units, along with the required ammunition, food, and medical supplies.