Patrol is an action that can be carried out by commanders and their units, which has them search the province for stealthy units and quell unrest in the province. Additionally, for provinces with a fort, only patrolling forces will be involved in any battles in the province outside the fort, along with any province defence. Troops moving to a forted province may join the patrollers for battles by clicking their "move" order and selecting "move and patrol".
Note that each unit has a calculated patrol strength, derived from its attributes. This value is relevant to the discussions below, and is given by:
Undisciplined units suffer a flat -0.5 to this value, which can reduce their patrol strength below zero. This means that they actively hinder patrolling efforts in the province. This value appears to be doubled for commanders. Additionally, this value is modified by the patrol bonus ability. Clicking the precision stat on the unit stat panel will display this value, however it appears to be always rounded up to one decimal place. There is evidence to suggest that the game does in fact use the unrounded values for calculations. The active patrol strength of a province appears to simply be the sum of this value for all patrolling units, plus the values produced from province defence.
Stealth strength = (Leader's stealth ability) - (number of stealthy units under their command with stealth ability < 50)
Destealth strength = (Sum of patrolling units' patrol strengths) - min(unrest, 100)/2 + max(0, province defence - 14)
Sneaking units are discovered if:
Destealth + 2d25 > Stealth + 2d25
Both of these rolls are open-ended.
When patrolling a province with unrest, an exploding d50 is rolled. If this value is greater than the sum of your patrol strength plus 25, nothing happens.
The unrest reduced is a random number between 0 and the total patrol strength inclusive. This number becomes the quantity of "filthy brigands" in the turn report.
Reducing unrest this way reduces province population by 10 * ((unrest reduction + 4)/5, rounded down).
This also reduces the province population by (population killed/10 - (province total population * 5)) + unrest reduction.
The following table below acts similar to the DRN table, except that it implements the d25 in place of the usual d6: thus it provides the chance of finding a sneaking commander. The difference represents the destealth strength minus the stealth strength in the province.
|National Spell||Summon||Unitnumbers||Patrol per Unit||Spell Cost||Type||Total patrol strength||Patrol Strength per gem/slave|
|Raven (Call of Winds)||40||1||10||A||40||4|
|Corpse Construct with Staff||1||1.1||1||A||4.4||4.4|
|Corpse Construct with Staff&Spool||1||1.1||1||A||6.6||6.6|
|Imps (Horde from Hell)||24||2||44||B||48||1.1|
|Crossbreed (usual foulspawn between 0.6 and 0.7)||20||0.63||15||B||12.6||0.84|
|Spirits of the Wood||10||1.2||8||N||12||1.5|
|y||Herd of Buffaloes||5||1.1||10||N||5.5||0.55|
|Reanimation (default human longdead)||10||1.4||3||D||14||4.7|
All values assuming casting at base level.