The Internal Security Intervention Service is the closest thing Serica has to an active police force. While a large number of minor charges are handled by corporate authorities and private bounty hunters, ISIS exists for the rare occasions where justice must be backed up by force.
ISIS is a largely municipal organization, with each Serican city its own precinct. Policy applying to multiple precincts and enforcement decisions in the regions between them is reserved for the courts, presidential administration, council, and in rare cases the higher echelons of ESIS leadership. Each precinct is headed by a Commissioner who serves as the highest administrative officer. Under them sits a Director, who handles tactical operations. The administrative branch is further broken up into various secretaries and departments, while tactical personnel are divided into teams of 6, operation elements of 26, and 130 man forces. A precinct typically has between 3 and 12 forces employed across its tactical branch. The administrative branch is typically 5-10 times larger, depending on the efficiency of the precinct. Riverstar’s unique civilian enforcement program provides a notable exception; its ISIS precinct employs less than 500 citizens divided into two tactical forces and 201 administrative staff.
The tactical operatives of an ISIS precinct are most frequently used for suspect extraction, and spend most of their time training or moving on lone suspects. All ISIS precincts are officially required to operate with the Global Strategic Institute‘s minimum 4:1 ratio for minimizing casualties in a combat scenario (this is why ISIS teams NEVER act with less than 6, and any incident involving more than 2 suspects involves multiple teams). Throughout history Directors have been known to falsify or ignore information to allow for action against a time-sensitive target when they didn’t have the necessary numbers. The average ISIS officer will participate in a single large-scale operation in their lifetime; be it a raid, sting, mass seizure of property, or open conflict with hostile elements.
The administrative wing of ISIS handles a much larger quantity of significantly less dramatic work. Maintaining the tactical branch is a small concern in comparison to the redirection of ALL civil and criminal cases inside the precinct to the correct courts, extensive intelligence work on the movements of registered and unregistered inhabitants and vehicles, and all the daily workings of social order.
It is worth note that crimes against unregistered citizens (which constitutes over 80% of violent crime in nearly every Serican city) cannot be prosecuted, though they can occasionally be pursued on civil grounds, through a loophole, or even as national human rights violations if the situation demands it. Because of this ISIS precincts can take on very strange arrangements, such as the one in Sunport, where they exist as gatekeepers between what is essentially an open criminal warzone and ‘civilized’ society.
ISIS is notoriously antagonistic with their ESIS counterparts, often seeing them as an arrogant, over-budgeted, and over-powered organization which does not actually have to contend with any real-world problems. This view is mostly a Southern one, where ESIS appears to do little more than take especially high-profile criminals away on their expensive ships. In the north, ISIS and ESIS find themselves confronting largely the same enemies (pirates, smugglers, terrorists) on a daily basis. As a result, there tends to be more unity between the two. Zenith is an exception to this rule, as it is virtually crime free and stands as the foundation of ALL Serican authority.