is an area of control. It is typically a city, region or drug corridor that is held by a 'Jefe de Plaza' of any certain faction that has managed to wrestle it under their control.
Plaza Bosses are typically elected by their peers, assigned by the leadership, or are otherwise the de-facto leaders of the faction they belong to.
The Plaza it self is a space that requires constant governance and the paying off of the appropriate authorities in order to operate freely. Beyond this, a Plaza Boss will frequently deploy estacas whom operate on-call 24hours a day and sleep in any variety of safehouses the organization has supplied for them. While also utilizing any variety of stolen or imitated police/military vehicles available to them.
A Plaza will also be teeming with 'Halcones', the radio operating scouts who patrol or are stationed to keep on the look out for military, police or rival movements and operations. Because of this, and through well crafted communications networks, an organization will know the movements of their enemies long before they have a chance to strike at their target.
Unless of course, the boss or his allies are somehow given up by the authorities in favour of greater pay by an opposing organization, or are otherwise betrayed by their own - often for similar reasons. When this happens, or when general chaos strikes the territory such as in the above photograph, it is referred to as 'heating up the plaza.'
Opposition groups do this in order to coerce the local populace and authorities into turning on their local crime bosses. Without this mechanism it is difficult for an opposing group to enter a plaza which is not under their explicit control.
Brute force in the manner of an invasion is unwise given the network of Halcones, and also for the fact you will be fighting your enemy on their home turf.
Instead, the taking of territory is best done by flipping a 'cell' which already operates in the territory you seek to gain, and to turn the authorities on your enemies through examples of violence, threats, and greater pay.
The Plaza is after all, the heart of Cártel operations and a power base through which an organization can extract rents from independent drug traffickers, pimps, extortionists and even rival groups. Because, if another group wishes for their shipment of drugs or weapons to pass through a corridor unhindered then they must pay for the right or risk annihilation.
Jefe de Plaza means to control all crime in the territory and to extract rents from it, similarly to a Godfather.