What does Reinforcing mean in a support relationship?

• A. A unit augments another unit's capabilities.
• B. A unit diverts its own operations to other theaters.
• C. A unit provides general support to the entire force.
• D. A unit replaces the supported unit entirely.

Answer: (A)

Reinforcing is about adding capability to the supported unit to increase its effectiveness. When a unit reinforces, it lends extra resources, skills, or capacity—such as more firepower, maintenance, logistics, or specialized support—that the supported unit needs to accomplish its mission or sustain operations. The reinforcing unit remains supplementary, enhancing what the supported unit can do rather than taking over its mission or operating independently.

This differs from diverting operations to another theater (redeployment of the unit itself), providing general support to the entire force (broad, non-unit-specific support), or replacing the supported unit entirely (substitution). For example, sending an additional maintenance and supply team to bolster a frontline company’s sustainment is reinforcing, because it augments that unit’s capabilities rather than replacing it.