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31B: Military Police'
https://www.thebalancecareers.com/31b-military-police-3345998
31D: Criminal Investigations Special Agents
https://www.thebalancecareers.com/31d-criminal-investigation-special-agent-3345999
31E: Internment/Resettlement Specialist
https://www.thebalancecareers.com/31e-internment-resettlement-specialist-3346000
Complete List Of Army Enlisted MOS's
https://www.thebalancecareers.com/complete-list-of-army-enlisted-mos-s-3346173
The MOS 31B Military Police, or MPs, also are trained in corrections and confining of inmates, prisoners of war, investigations and mobility security support around the world. Their main job is to protect and preserve the rule of law.
The MOS 31D CID special agents can expect to investigate such criminal activity as espionage, treason, and terrorism.
The MOS 31Es are assigned to duty stations with military prisons, such as Guantanamo Bay, Cuba, Fort Leavenworth, and Camp Humphreys, Korea.