Terrain

This article describes terrain in land provinces.
For naval terrain, see naval terrain.

See also: Weather

The terrain of land provinces can affect the movement and combat performance of units, and cause attrition. Harsh terrain tends to favor the defender.

Terrain map.
Legend:
desert = "red background with ⛭"
hills = "cornsilk background with △"
mountain = "light gray background with ▲"
ocean = "blue background with ~"
lakes = "blue background with no symbol"
marsh = "olive background with ⚶"
forest = "spring green background with ♧"
jungle = "yellow green background with ♣"
plains = "orange background with no symbol"
urban = "dark gray background with ⚑"

]]

Types

Each land province has a terrain type, which is shown when the province is selected.

• Combat width: Maximum amount of battalions that can fight in a province. "+Additional attacks" is how much combat width will be added for each extra direction of attack into the province.
• Movement cost: Increases the distance units have to travel by this factor.
• Attrition: When at war, land units moving from this terrain type suffer this amount of attrition.
• Attack: Adjuster to the attacker's soft/hard attack and breakthrough when the defender is in this terrain.
• Enemy air superiority: If the enemy has air superiority, their bonus is reduced by this amount.
• Sickness: Army leaders may become temporarily unwell when units are in this terrain.
• Supply flow penalty factor: Reduces the flow of hub supply into a province with this terrain.
• Truck attrition factor: Increases the rate of attrition for trucks used to motorize supply hubs in this terrain.

Terrain	Combat width	Movement cost	Attrition (equipment loss)	Attack	Enemy air superiority	sickness	Supply flow penalty factor	Truck attrition factor	Graphic (normal)	Graphic (Winter)
Desert	90(+45)	+5%	+15%			1	0.14	0.5
Forest	84(+42)	+50%		-15%	-10%		0.08	0.2
Hills	80(+40)	+50%		-25%	-5%		0.1	0.2
Jungle	84(+42)	+50%	+20%	-30%	-25%	1	0.16	3.0
Marsh	78(+26)	+100%	+35%	-40%		1	0.16	4.0
Mountain	75(+25)	+100%	+30%	-50%	-10%		0.12	1.0
Plains	90(+45)
Urban	96(+32)	+20%		-30%	-50%		-0.2
Lake

Paths

A path between two adjacent provinces is the straight line between their centers. It is traced on a pixel grid, making diagonal lines noticeably longer than north-south and east-west lines. The terrain along this path (along with its distance) determines its movement cost.

The path may consist of the source and target province's terrain in varying proportions or even different terrains altogether. For example the path between two coastal mountain provinces at a fjord might consist of 40% mountain and 60% ocean, resulting in +40% movement cost for this path instead of +100% in a pure mountain range.

The path also determines whether direction-dependent terrain features apply.

Terrain features

Terrain features can apply adjusters and modifiers in addition to the base terrain. They stack multiplicatively with base terrain values. They only affect the attacker because some of them depend on the path and the defender might fight against attackers from different directions. The attack adjuster applies to the attacker's soft/hard attack and the defense adjuster to their breakthrough.

• Small river: -30% to attack/defense and -25% to movement.
• Large river: -60% to attack/defense and -50% to movement.
• Amphibious landing: -70% to attack/defense.
• Fort (land and naval): -15% to attack/defense per level.

The river adjuster applies when a path intersects a river. If a river modifier is applied in combat, this also allows other battle tactics. The amphibious landing penalty applies when a unit attacks a land province from a sea province. The movement cost of an amphibious landing is a fixed length.

The fort adjuster applies to land forts in all directions. With each flanking attack the bonus gets diminished. Naval forts reduce the attack when attacking in an amphibious landing, and when attacking across a strait.

Unit-specific adjusters

Units may have specific adjusters in addition to the base terrain and terrain feature adjusters. The net adjuster for a division is the average of its combat battalions, plus the sum of the adjusters of its support battalions. Among the regular terrain adjusters, the attack value modifies the attacker's attack and breakthrough, and the defense value modifies the defender's attack and defense.

For terrain feature adjusters (except amphibious and forts), the attack value modifies the attacker's attack, and the defense value modifies the attacker's breakthrough. The amphibious and fort adjusters ignore their defense value and use the attack value for both attack and breakthrough. The unit's adjuster stacks additively with the terrain and terrain feature adjuster respectively. Divisions lacking manpower have proportionately smaller bonuses and penalties.

Units move at the slowest speed of a combat battalion (adjusted for terrain). Recon units can increase the max speed of units for some terrain.

Note that positive amphibious and fort attack adjusters cannot exceed the base penalty, while river adjusters can.

Attack

List of terrain attack adjusters by unit

Unit	Type	Forest	Hills	Mountain	Plains	Urban	Jungle	Marsh	Desert	River	Amphibious	Fort
Amphibious Armor	Combat	−20%		-10%	-10%	-40%	-30%	+30%		+40%	+60%
Amphibious Mechanized	Combat	-20%		-5%		-20%	-30%	+20%		+30%	+50%
Anti-Air	Combat	−10%					−20%	−20%		−20%	−40%
Anti-Tank	Combat	−20%					−25%	−20%		−20%	−40%	+10%
Armored Car	Combat	−20%		-10%		-30%	−30%	−10%		−20%	−40%
Artillery	Combat	−20%					−25%	−20%		−20%	−40%	+10%
Bicycle Battalion	Combat
Camel	Combat	−5%	−5%	−10%		−5%	−10%		+5%		−40%
Cavalry	Combat	−5%	−5%	−10%		−5%	−10%				−40%
Engineer Company	Support					(+10%)				(+10%)	+25%	+10% (+20%)
Field Hospital	Support
Heavy SP Anti-Air	Combat	−40%	−20%	−30%		−50%	−60%	−40%		−40%	−80%
Heavy SP Artillery	Combat	−40%	−20%	−30%		−50%	−60%	−40%		−40%	−80%
Heavy Tank	Combat	−40%	−20%	−30%		−50%	−60%	−40%		−40%	−80%	+10%
Heavy Tank Destroyer	Combat	−40%	−20%	−30%		−50%	−60%	−40%		−40%	−80%	+5%
Infantry	Combat
Light SP Anti-Air	Combat	−20%		−10%		−40%	−30%	−10%		−20%	−60%
Light SP Artillery	Combat	−20%		−10%		−40%	−30%	−10%		−20%	−60%
Light Tank	Combat	−20%		−10%		−40%	−30%	−10%		−20%	−40%
Light Tank Destroyer	Combat	−20%		−10%		−40%	−30%	−10%		−20%	−60%
Logistics Company	Support
Maintenance Company	Support
Marines	Combat							+30%		+30%	+50%
Mechanized Infantry	Combat	−20%		−5%		−20%	−30%	−10%		−20%	−40%
Medium SP Anti-Air	Combat	−30%	−10%	−20%		−40%	−40%	−10%		−20%	−70%
Medium SP Artillery	Combat	−30%	−10%	−20%		−40%	−40%	−10%		−20%	−70%
Medium Tank	Combat	−30%	−10%	−20%		−40%	−40%	−10%		−20%	−80%
Medium Tank Destroyer	Combat	−30%	−10%	−20%		−40%	−40%	−10%		−20%	−70%
Military Police	Support
Modern SP Anti-Air	Combat	−30%	−10%	−20%		−40%	−40%	−10%		−20%	−70%
Modern SP Artillery	Combat	−30%	−10%	−20%		−40%	−40%	−10%		−20%	−70%
Modern Tank	Combat	−30%	−10%	−20%		−40%	−40%	−10%		−20%	−70%
Modern Tank Destroyer	Combat	−30%	−10%	−20%		−40%	−40%	−10%		−20%	−70%
Motorized Anti-Air	Combat	−10%					−20%	−20%		−20%	−40%
Motorized Anti-Tank	Combat	-20%					-25%	-20%		-20%	-40%	+10%
Motorized Artillery	Combat	−20%					−25%	−20%		−20%	−40%	+10%
Motorized Infantry	Combat	−10%		−5%		−10%	−20%	−10%		−10%	−20%
Motorized Rocket Artillery	Combat	−20%					−25%	−20%		−20%	−40%	+10%
Motorized Rocket(Katyusha}	Combat	−10%					−25%	−20%		−20%	−40%	+10%
Mountaineers	Combat		+20%	+35%
Paratroopers	Combat
Recon Company	Support
Rocket Artillery	Combat	−20%					−25%	−20%		−20%	−40%	+10%
Signal Company	Support
Super Heavy SP Anti-Air	Combat	−50%	−30%	−40%		−60%	−70%	−50%		−50%	−100%
Super Heavy SP Artillery	Combat	−50%	−30%	−40%		−60%	−70%	−50%		−50%	−100%
Super Heavy Tank Destroyer	Combat	−50%	−30%	−40%		−60%	−70%	−50%		−50%	−100%	+30%
Super-Heavy Tank	Combat	−50%	−30%	−40%		−60%	−70%	−50%		−50%	−100%	+50%
Support Anti-Air	Support
Support Anti-Tank	Support
Support Artillery	Support
Support Rocket Artillery	Support
Light Flame Tank Company	Support	+5%	+5%	+5%		+10%	+10%	+5%		+10%	+10%	+10%
Medium Flame Tank Company	Support	+10%	+5%	+5%		+15%	+15%	+5%		+10%	+10%	+20%
Heavy Flame Tank Company	Support	+10%	+5%			+10%	+10%	+5%		+5%	+5%	+25%

Defense

List of terrain defense adjusters by unit

Unit	Type	Forest	Hills	Mountain	Plains	Urban	Jungle	Marsh	Desert	River	Amphibious	Fort
Amphibious Mechanized	Combat					-5%
Amphibious Tank	Combat					-10%
Anti-Air	Combat
Anti-Tank	Combat
Armored Car	Combat
Artillery	Combat
Bicycle Battalion	Combat
Camel	Combat								+5%
Cavalry	Combat
Engineer Company	Support	+25%	+10%			(+10%)	+25%	+25%		+25% (+35%)		+25% (+35%)
Field Hospital	Support
Heavy SP Anti-Air	Combat					−20%
Heavy SP Artillery	Combat					−20%
Heavy Tank	Combat					−20%
Heavy Tank Destroyer	Combat					−20%
Infantry	Combat
Light SP Anti-Air	Combat					−10%
Light SP Artillery	Combat					−10%
Light Tank	Combat					−10%
Light Tank Destroyer	Combat					−10%
Logistics Company	Support
Maintenance Company	Support
Marines	Combat
Mechanized Infantry	Combat					−5%
Medium SP Anti-Air	Combat					−10%
Medium SP Artillery	Combat					−10%
Medium Tank	Combat					−10%
Medium Tank Destroyer	Combat					−10%
Military Police	Support
Modern SP Anti-Air	Combat					−10%
Modern SP Artillery	Combat					−10%
Modern Tank	Combat					−10%
Modern Tank Destroyer	Combat					−10%
Motorized Anti-Air	Combat
Motorized Anti-Tank	Combat
Motorized Artillery	Combat
Motorized Infantry	Combat					-5%
Motorized Rocket Artillery	Combat
Motorized Rocket (Katyusha)	Combat
Mountaineers	Combat		+5%	+10%
Paratroopers	Combat
Recon Company	Support
Rocket Artillery	Combat
Signal Company	Support
Super Heavy SP Anti-Air	Combat					−20%
Super Heavy SP Artillery	Combat					−20%
Super Heavy Tank Destroyer	Combat					−20%
Super-Heavy Tank	Combat					−20%
Support Anti-Air	Support
Support Anti-Tank	Support
Support Artillery	Support
Support Rocket Artillery	Support

Movement

List of terrain movement adjusters by unit

Unit	Type	Forest	Hills	Mountain	Plains	Urban	Jungle	Marsh	Desert	River	Amphibious	Fort
Amphibious Mechanized	Combat
Amphibious Tank	Combat	-40%			-10%		-40%
Anti-Air	Combat	−10%					−20%	−20%		−20%
Anti-Tank	Combat	−20%	−5%	−20%			−25%	−30%		−20%
Armored Car	Combat	−40%		-10%			−50%	−20%	+15%	−20%
Armored Car Recon Company	Support	+5%	+10%	+5%	+15%		+5%		+15%	+10%
Artillery	Combat	−20%	−5%	−20%			−20%	−30%		−20%
Bicycle Battalion	Combat		+10%	+5%	+20%	+20%		+5%	+5%	−5%	−5%
Camel	Combat		−5%	−5%	+15%	−5%		+5%	+10%
Cavalry	Combat			−5%
Cavalry Recon Company	Support	+5%	+10%	+10%	+5%		+10%	+10%	+5%	+10%
Engineer Company	Support	+5%						+20%		+25%
Field Hospital	Support
Heavy SP Anti-Air	Combat	−40%					−40%	−20%		−40%
Heavy SP Artillery	Combat	−40%					−40%	−20%		−40%
Heavy Tank	Combat	−40%					−40%	−20%		−40%
Heavy Tank Destroyer	Combat	−40%					−40%	−20%		−40%
Infantry	Combat
Light SP Anti-Air	Combat	−40%					−40%	−10%		−20%
Light SP Artillery	Combat	−40%					−40%	−10%		−20%
Light Tank	Combat	−40%					−40%	−10%		−20%
Light Tank Destroyer	Combat	−40%					−40%	−10%		−20%
Light Tank Recon Company	Support	+10%	+10%	+10%	+10%		+10%	+10%	+10%	+10%
Logistics Company	Support
Maintenance Company	Support
Marines	Combat
Mechanized Infantry	Combat									−20%
Medium SP Anti-Air	Combat	−40%					−40%	−10%		−20%
Medium SP Artillery	Combat	−40%					−40%	−10%		−20%
Medium Tank	Combat	−40%					−40%	−10%		−20%
Medium Tank Destroyer	Combat	−40%					−40%	−10%		−20%
Military Police	Support
Modern SP Anti-Air	Combat	−40%					−40%	−10%		−20%
Modern SP Artillery	Combat	−40%					−40%	−10%		−20%
Modern Tank	Combat	−40%					−40%	−10%		−20%
Modern Tank Destroyer	Combat	−40%					−40%	−10%		−20%
Motorized Anti-Air	Combat	−50%					−50%	−20%		−20%
Motorized Anti-Tank	Combat	−50%	−5%	−20%			−50%	−30%		−20%
Motorized Artillery	Combat	−50%	−5%	−20%			−50%	−30%		−20%
Motorized Infantry	Combat	−50%					−50%	−30%		−10%
Motorized Recon Company	Support	+5%	+10%	+10%	+15%		+5%	+10%	+20%	+10%
Motorized Rocket Artillery	Combat	−50%	−5%	−20%			−50%	−30%		−20%
Motorized Rocket (Katyusha)	Combat	−50%	−5%	−20%			−50%	−50%		−20%
Mountaineers	Combat		+10%	+20%
Paratroopers	Combat
Rocket Artillery	Combat	−20%	−5%	−20%			−20%	−30%		−20%
Signal Company	Support
Super Heavy SP Anti-Air	Combat	−40%					−40%	−20%		−40%
Super Heavy SP Artillery	Combat	−40%					−40%	−20%		−50%
Super Heavy Tank Destroyer	Combat	−40%					−40%	−20%		−50%
Super-Heavy Tank	Combat	−40%					−40%	−20%		−50%
Support Anti-Air	Support
Support Anti-Tank	Support
Support Artillery	Support
Support Rocket Artillery	Support
Light Flame Tank Company	Support											+10%
Medium Flame Tank Company	Support											+10%
Heavy Flame Tank Company	Support											+10%

Mechanics

Events and Decisions

Events • Decisions