Land units

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The smallest military unit is called a cohort. A cohort is comprised of 1000 men; these 1000 men are subtracted from the manpower pool when the cohort is recruited. A number of cohorts can be grouped to form an army.

Cohorts are trained in territories at a cost of money, Manpower.png manpower and time. When a cohort is fully trained, it either forms an army or joins the existing one in that place. Cohorts can also be hired from the army window, in which case they will march to join the army once trained.

Cohorts can usually be moved between armies in the same territory for no cost, with the exception of mercenary armies and tribal retinues: they cannot be merged with normal units nor split into different armies.

Basic stats[edit]

All units types have the same basic stats:

  • strength = All units start at 1000 strength, equivalent to the 1000 Manpower.png manpower it cost to build
    • A cohort at 750 strength will cost 250 Manpower.png manpower to replenish
    • The replenishment time it takes for a cohort regain full strength depends on the Manpower recovery speed.png manpower recovery rate
  • morale = 3.0

List of unit types[edit]

There are 10 types of land units; only 2 (3 if you count Supply Trains) of them are always available. Others can be acquired by having required resources or Military Traditions.

Unit type Cost Time Monthly Cost upkeep Build requirements Siege assault Move-
ment
speed
Maneuver Morale
damage
taken
Strength
damage
taken
Attrition weight Attrition loss Food storage Food con-
sumption
Unit archers.png Unit camel cavalry.png Unit chariots.png Unit heavy cavalry.png Unit heavy infantry.png Unit horse archers.png Unit light cavalry.png Unit light infantry.png Unit war elephants.png Unit supply train.png
Unit archers.png Archers 6 45 0.24 none, always available 2.5 1 +25% −10% 5% 2.4 0.1 −10% −10% +10% −10% +25% +100%
Unit camel cavalry.png Camel Cavalry 13 40 0.54 Camels Camels 3.5 4 2.5% 3.6 0.2 +10% +10% −20% −10% +10% +10% −50% +100%
Unit chariots.png Chariots 6 45 0.24 Military tradition: Barbarian or Indian 2.5 1 5% 2.4 0.2 +20% −10% −50% −10% −50% +10% +35% −50% +100%
Unit heavy cavalry.png Heavy Cavalry 14 120 0.58 Horses Horses 3.5 2 +100% 5% 2.4 0.25 +50% +10% +25% −10% +20% +25% −50% +100%
Unit heavy infantry.png Heavy Infantry 14 60 0.58 Iron Iron 2.5 1 −10% +50% 5% 2.4 0.2 −10% +25% +20% −25% −10% +20% +100%
Unit horse archers.png Horse Archers 14 60 0.58 Steppe horses Steppe Horses 4 5 +25% +50% 5% 3 0.25 +25% −10% +25% −10% +25% −10% +25% −20% +100%
Unit light cavalry.png Light Cavalry 7 45 0.29 Horses Horses 4 3 +50% 5% 2.4 0.25 +25% +25% −20% −50% +25% +25% −50% +100%
Unit light infantry.png Light Infantry 6 30 0.24 none, always available 2.5 1 −25% −50% 2.5% 2.4 0.1 −10% −10% −25% −25% −50% −25% +100%
Unit war elephants.png War Elephants 26 365 1.08 Elephants Elephants 2.5 0 −50% +200% 10% 1 0.3 +50% −10% +50% −10% +40% −10% −10% +30% +100%
Unit supply train.png Supply Train 16 120 0.66 none, always available 2.5 1 +100% 10% 50 0.05 −90% −90% −90% −90% −90% −90% −90% −90% −90%

Combat-only stats.

(Top row: damage dealt; bottom: damage taken from the enemy.)

Unit type Maneuv. Morale
DMG
taken %
STR
DMG
taken %
Unit archers.png % Unit camel cavalry.png % Unit chariots.png % Unit heavy cavalry.png % Unit heavy infantry.png % Unit horse archers.png % Unit light cavalry.png % Unit light infantry.png % Unit war elephants.png % Unit supply train.png %
Unit archers.png Archers 1 +25 -10
+10
-
+20
-10
+50
+10
-
-
+25
-10
+25
+25
-10
-
+50
+100
-90
Unit camel cavalry.png Camel Cavalry 4 +10
-10
+10
-10
-20
+10
-10
-10
+10
-10
-
-
+10
-
-50
-10
+100
-90
Unit chariots.png Chariots 1 +20
-
-10
+10
-50
+25
-10
+25
-50
+25
+10
+25
+35
-10
-50
+50
+100
-90
Unit heavy cavalry.png Heavy Cavalry 2 +50
-10
+10
-20
+25
-50
-10
+20
-
-10
+20
-20
+25
-20
-50
-10
+100
-90
Unit heavy infantry.png Heavy Infantry 1 -10 -
+10
-10
-10
+25
-10
+20
-10
-25
+25
-10
-50
+20
-25
-
+40
+100
-90
Unit horse archers.png Horse Archers 5 +25 +25
-
-10
+10
+25
-50
-10
-
+25
-25
-10
+25
+25
-50
-20
-10
+100
-90
Unit light cavalry.png Light Cavalry 3 +25
-10
-
-
+25
+10
-20
+20
-50
-10
+25
-10
+25
-
-50
-10
+100
-90
Unit light infantry.png Light Infantry 1 -25 -10
+25
-
+10
-10
+35
-25
+25
-25
+20
-50
+25
-
+25
-25
+30
+100
-90
Unit war elephants.png War Elephants 0 -50 +50
-
-10
-50
+50
-50
-10
-50
+40
-
-10
-20
-10
-50
+30
-25
+100
-90
Unit supply train.png Supply Train 1 +100 -90
+100
-90
+100
-90
+100
-90
+100
-90
+100
-90
+100
-90
+100
-90
+100
-90
+100

Explanations[edit]

  • Siege assault: Whether this unit type can assault forts.
  • Movement speed: Speed on the map. (Armies move at the speed of its slowest unit.)
  • Maneuver: How many squares away this unit type can target an enemy on the Battle chess board. Units with 1 maneuver can target one of the 3 squares in front of them, while elephants with 0 maneuver can only attack one, directly ahead of them.
  • Morale damage taken: Affects how fast the unit flees from combat. Also affects caused morale damage (scales with unit's morale)
  • Strength damage taken: Affects how much manpower will be lost in combat. Also slightly affects all caused damage (scales with unit's strength).
  • Attrition weight: An army will take attrition if its weight is higher than the supply limit in the territory.
  • Unit type icons: Multiplier for caused damage against that unit type.

Modifiers to unit types[edit]

There are many modifiers to the available unit types. Most of them are unlocked from Military Traditions and Technology.

  • Discipline: Increases caused damage.
  • Terrain bonus: Increases caused damage when fighting in a specific terrain.
  • Offense: Increases caused damage.
  • Defense: Reduces received damage.
  • Morale: Increases caused morale damage and makes the unit stay longer in combat.
  • Maintenance: Reduces upkeep costs.
  • Starting experience: Increases initial experience when recruiting this unit.

Each cohort may also become loyal to a specific character giving +10% Discipline.

Unit type strategy[edit]

Based on the various bonuses and penalties, each unit type seems to fall into certain categories.

Supply trains[edit]

These are not combat units. Their only ability is to have a lot of food capacity, in case attrition is a major issue. But, they seem to count for calculations of Cohorts for sieges. When looking at units' strengths, there is no point including this one. It takes +100% and deals −90% damage towards everything. If it is deployed to the battle, you may need more units to put in the front line.

Their high price means they should be deployed in moderation, but the long duration for them to fill up with food means they should not be deployed too late either.

Light infantry[edit]

There are only a few good things you can say about light infantry. While every other unit has some unit they counter, light infantry only has some units they are not too heavily countered by:

  • They are cheap, with the same price Level as archers and chariots. They have a incredibly low attrition weight. Both this and the gold price makes them ideal if bodies rather then quality are needed, like for sieges. However even here, archers might be better in all but the most extreme cases.
  • They have a lot of buffs from trade goods (leather and base metals) and a fair share of military traditions.
  • A decent amount of combat tactics also have a high efficiency for them.
  • While they take −25% morale damage, that barely offsets them taking around +25% morale and strength damage from every enemy. That also means they churn through more manpower in battle than perhaps any other unit.
  • They can be used to "pad out" the side of the front line, to avoid the enemy being able to fully use flanking. This is a rare case where the reduced morale damage could be useful, despite the cost in manpower.
  • They also have a lot of damage penalties. Their only hope seems to be to outlast the enemy on the morale front. They could also outnumber the enemy on sheer cohort count 1:2 at comparable prices − except manpower of course.
  • Camel cavalry are the only thing they can claim to counter somewhat.

Archers[edit]

The first step up from light infantry and a mainstay of many armies.

  • Their increased morale damage makes them more likely to flee, but such a behaviour can conserve manpower and make room for the 2nd tier cohorts − ideally things countering whatever drove off the archers. They are supposed to deal damage, but fall back to let others deal damage if they are countered.
  • They do well against heavy infantry, at a fraction of the cost, as long as they outnumber the enemy.
  • Not a lot of combat tactics make good use of them.
  • Heavy and light cavalry in turn counter them heavily, but again they can quickly disengage due to extra morale damage without taking too many losses.

Chariots[edit]

Old technology from the Bronze Age, they are largely outdated by the time of the game and accordingly only used by few:

  • Only available to barbarians and a few other military traditions.
  • The poor man's heavy infantry. If you lack the resources or the supply for those but have them available, they are a viable alternative.
  • Strong versus archers and light infantry, extra countered by heavy infantry and heavy cavalry. Cannot assault in a siege.
  • Can deal a lot of damage, but also take a lot.
  • As cheap as light infantry and archers.

Heavy infantry[edit]

The mainstay of civilised and barbarian field armies of the period, but often hard to get:

  • Requires Iron, a rather rare trade-good in some areas. Chariots are usually an alternative in those cases.
  • They also cost a lot of supply and money, making them primarily useful in very favourable terrain with high Civilisation.
  • Archers and horse archers counter them, along with elephants. Most other unit types have a poor match-up.

Elephants[edit]

The ultimate melee unit, with a very high price to match. In almost everything the antithesis of the light infantry:

  • Extremely expensive in money, supply, food and even time
  • The ultimate first line in the game
  • They barely take any strength damage and deal a lot of damage in return
  • Strategies that affect them tend to have more effect then on any other unit type, with Shock Action giving a unmatched 200%.
  • One-on-one, there is no unit that has any hope of countering them.
  • The main counter is to outnumber them, especially with horse archers.
  • Heavy infantry. light infantry and archers can also be counter options, since they don't have as high penalties to attacking elephants as others.
  • Supply might be their worst enemy.

Light cavalry[edit]

Coming out of the Bronze Age, riding horses became a major factor in warfare:

  • Almost as cheap as archers and light infantry.
  • Very high maneuver, with easily available horses. Usually the first flanking option one can find.
  • Quite deadly against archers and the only counter to horse archers, making them a possible 1st Cohort option.
  • Very good and very available flanker.
  • Best movement speed in the game, making them useful for quick reaction forces.

Camel cavalry[edit]

The light cavalry of the desert regions.

  • Usage is almost identical to light cavalry; refer to section for the basics.
  • More expensive in gold.
  • Inferior combat bonuses, but also penalties.
  • Comparatively good supply, food storage/consumption and high maneuver.

Heavy cavalry[edit]

Putting armor on horses and riders results in totally different usages:

  • Available along with light cavalry, but uses are utterly different.
  • Works nothing like any other cavalry units, more like a heavy infantry variant.
  • Worse maneuver than light cavalry, well suited for the front line.
  • More expensive in supplies and money.
  • Stronger than heavy infantry against archers and most cavalry.
  • The primary counter is heavy infantry, but horse archers are able to outlast them.
  • Pretty good movement speed can give them a place in reaction forces.

Horse archers[edit]

Combines the best parts of cavalry and archers:

  • In bonuses, penalties and stats, it uses the better of archers or light cavalry.
  • In money and supply, it is the same as heavy infantry.
  • Counters heavy infantry, but countered by light cavalry, camels and, potentially, elephants.
  • The ultimate maneuver/flanking unit.

Migratory units[edit]

These are a special unit type, composed by Light infantry, available only to migratory tribes. Migratory units are created in the territory tab at the cost of Stability.png 8 stability (this value can be modified by laws and by lowering centralization level). Migratory units can move across borders without military access and can settle in uncolonized lands or in occupied enemies' territories.

Migratory units, beyond settling, can perform two specific actions in non-owned colonized territories where they are standing:

  • Raze: at the cost of Aggressive expansion.png +2 aggressive expansion, civilization in the territory will be reduced by half and the tribe gains advancement in each technology field equal to the amount of civilization razed divided by 10 (e.g. razing a 44 civilization territory will reduce civilization to 22 and give +2.22 technology advance in every field). The razed territory gets the Razed! modifier (−0.01% monthly civilization change) for five years.
  • Pillage: Available only in territories with at least 20 civilization level. The tribe gets an amount of Political influence.png political influence and Cost gold. The pillaged territory gets the Province Pillaged modifier (-0.25% local population growth, −25% commerce value) for five years.

If these actions are performed multiple times against the same country, reducing their opinion to -200, the migratory tribe will automatically declare war on them with the Show Superiority casus belli.

Migratory units can be merged with regular units but can't be raised during war.

Non-military implications[edit]

Cohorts are not politically neutral in Imperator. In fact, they have many important implications in a state's politics.

  • Cohorts can become loyal to a general personally, rather than to the state. While this decreases their maintenance costs (as the general is paying part of the expenses), loyal cohorts can be regarded as the general's "private" army. This is especially crucial if the general is disloyal and the state is in danger of civil war.
    • In tribal states, clan retinues are always loyal to their respective clan chiefs. Clan retinue size decreases as centralization increases.
  • Generals and clan chiefs gain power base and prestige based on the number of cohorts commanded and loyal to them personally.