Posted on Feb 28, 2020
What are the major differences between Security Forces (3P0X1), Military Police (31B), USMC Military Police 5811, and Master-at-Arms (MA)?
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Duties, capabilities, mission, readiness, etc.
I'm hoping to help someone in the future who may be thinking about entering law enforcement through the military.
I'm hoping to help someone in the future who may be thinking about entering law enforcement through the military.
Posted in these groups: 
MA: Master-at-Arms
31B: Military Police
5811: Military Police
3P: Security Forces
MA: Master-at-Arms 31B: Military Police 5811: Military Police 3P: Security Forces
Posted >1 y ago
Responses: 12
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I’ve worked with Army Military Police and from what I understand they focus more on Infantry related concepts such as convoys and off-base patrols when deployed. Security Forces rarely do Infantry work, and they are more focused on base security and law enforcement. Although this is from a National Guard perspective and I’m sure active duty does a lot of law enforcement work on the Army side.
Security Forces core duties: Base patrol and law enforcement, flight line security, and gate entry control. Active shooter response is a big focus now as well.
Security Forces core duties: Base patrol and law enforcement, flight line security, and gate entry control. Active shooter response is a big focus now as well.
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SrA (Join to see)
Yes but at least on the Air National Guard SF side, convoying is rarely emphasized. I just know that our Army MP counterparts are much more experienced in it. I’ve also been under both AMC and ACC and only noticed little differences between what they do and train on. AMC seems to just be a little more relaxed if anything.
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SrA Michael Thompson
Rarely do off base patrols? During Iraq War we did out the wire patrols quite a lot. I was in an SF unit that had an entire sector in south Baghdad. Probably just depends on your time of service, honestly SF/MP were pretty much interchangeable a few years back.
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Most Army MPs do more time in the Field than Law Enforcement but all get training for and do law enforcement missions. when you graduate from Army MP AIT now you have completed all the training to be a certified officer in Missouri (where the training is).
Good Luck to your friend.
Good Luck to your friend.
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For the Navy, CNIC doesn’t care about LE. The Navy only cares about ships in the sea and planes in the air. The current focus for the LE aspect is ATFP. The LE side is very under trained and outdated. However where the rage differentiates from other branches LE jobs is the CRG/ CRS side of things. Expeditionary is a whole different animal.
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