Under the Posse Comitatus Act of 1878, MWDs will primarily be used for what?

• A. Patrol and guard duties
• B. Public relations missions
• C. Detection
• D. Training and evaluation

Answer: (C)

The key idea is that the Posse Comitatus Act keeps federal troops from performing domestic law enforcement actions. Military working dogs are used in a way that supports enforcement without the dog itself acting as the enforcer. Their primary role is detection—sniffing out explosives, narcotics, or contraband and then alerting their handler. This allows the appropriate civilian or military police authorities to complete any enforcement steps, rather than having the dog directly conduct arrests or searches.

Patrol and guard duties could be seen as security tasks that edge toward enforcement, so they aren’t the default role under this constraint. Public relations missions and training/evaluation aren’t about identifying and countering threats. So detection is the best fit given the legal framework and typical mission design.