What type of contract support normally includes a mix of employees that are U.S. citizens, third country nationals, and local national contractors?

The correct answer pertains to external support because this type of contract support is characterized by involving various personnel with diverse backgrounds, including U.S. citizens, third country nationals, and local national contractors. External support typically refers to services procured from outside the organization or military unit, and it often leverages the skills and expertise of personnel from multiple nations to provide comprehensive assistance tailored to mission requirements.

This blend of personnel can enhance the operational flexibility and effectiveness of support provided in different theaters of operation, addressing specific regional needs by utilizing local knowledge, while still maintaining oversight and access to U.S.-based expertise. External support aims to create a cooperative environment that bridges capabilities from various sources, thereby improving overall mission success.

In contrast, internal support primarily involves personnel and resources that are already part of the organization, focusing on using the capabilities within the unit. Theater support generally refers to assistance and logistics specifically available within a given area of operations, which may also include a combination of personnel but is more localized to the deployed area. Systems support focuses on maintaining and managing specific systems or equipment, typically involving specialized technical knowledge rather than a diverse workforce.