The Military Police Regiment (憲兵団 Kenpeidan?) is the most prestigious military sector due to their work, which allows citizens to live safely within the inner Wall and results in abundant resources. Therefore, it has higher authority over other military sectors. However, in reality, it is the most corrupted military sector due to a lack of oversight compared to the other sectors of the military. Due to their misuse and abuse of power, the Military Police Regiment is also at odds with the Garrison and especially with the Scout Regiment. Only the top ten alumni from trainee squads can apply for the Military Police Regiment. However, according to the conversation between Hitch Dreyse and Boris Feulner, there are other (illicit) ways to get in the sector such as fraternization, favoritism, etc.
The Military Police Regiment is the primary police force within human territory. Not only do they maintain order, they serve as the king's guard. Since they do not normally come in contact with Titans, they must have special permission to use omni-directional mobility gear and usually carry firearms such as rifles instead. They are also in charge of tax collection and land distribution. They usually abuse these duties to exploit resources and food from civilians.
During the mass destruction being caused by Eren Jaeger and Annie Leonhart in the Stohess District. The Military Police's task of guarding the Scout Regiment is abandoned. Nile Dawk orders the Military Police to evacuate all civilians.
However, these duties were abused by the Military Police Regiment officials, as it is in their nature.
Primary duties also include supervising of the Training Corps, monitoring the Garrison, and directing fire-fighting operations.
The Military Police Regiment is an organization with 2,000 members, with direct command over 3,000 additional personnel from the Garrison. This brings their total potential manpower to 5,000 soldiers. Their forces are divided between the major Districts, with 200 officers assigned per District.
The Military Police Regiment is intended to be an elite unit made of the most skilled soldiers due to its rigorous standards. The reality, however, is a lazy, corrupt system that selfishly benefits from the powers granted to it, with these powers being abused and taken unnecessarily advantage of. Though they are from the top ten graduates from the trainee squads, they are inexperienced as they only stay in the safety of Wall Sina and never directly engage in battle with Titans.The senior officers have been seen spending all their time gambling and drinking while leaving recruits to do all the work. According to Marlo Freudenberg, they also pilfer taxes and misappropriate land. This corruption is well-known with many people (even to Wall Sina citizens) criticizing their lack of care for anyone other than themselves. Refugees and forced laborers (called producers) hold simmering hostility against them.
However, many trainees still dream of joining the Military Police Regiment, because it will allow them to live within Wall Sina and safety. Also, being so close to the center of human territory, most policemen have relatively little experience fighting Titans as compared to the Scout Regiment or the Garrison Regiment. This, together with corruption, loose discipline, contempt from public, abuse of power makes this military branch the most incompetent out of the three.