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Map terrain

Crusader Kings II features different terrain types, as well as oceans and seas. Each type of terrain has its own effect on your army. Terrain affects your army's supply limit, movement speed, attrition and defence (for the defending troops).

You can view each county's terrain type by switching to the terrain map mode (lower right corner) and hovering your mouse over the map. A tooltip will tell you the terrain type.


Following are the terrain types and their modifiers.

Terrain type Modifier
inland ocean movement_cost = 1.0
arctic movement_cost = 1.0
max_attrition = 0.1
supply_limit = 1
farmlands

movement_cost = 1.25

supply_limit = 5

forest

movement_cost = 2.25
max_attrition = 0.025

supply_limit = 3

defence = 2

hills movement_cost = 1.66
defence = 4
max_attrition = 0.025
supply_limit = 3
woods movement_cost = 1.1
defence = 1
supply_limit = 3
mountains

movement_cost = 3.0
defence = 5
max_attrition = 0.1

supply_limit = 2

impassable mountains movement_cost = 8.0
defence = 6
steppe movement_cost = 1.0
supply_limit = 4
plains movement_cost = 1.1
supply_limit = 5
jungle movement_cost = 3.0
defence = 2
max_attrition = 0.05
supply_limit = 2
marsh

movement_cost = 2.2
defence = 3
max_attrition = 0.05

supply_limit = 2

desert

movement_cost = 1.25
max_attrition = 0.1

supply_limit = 1

coastal desert movement_cost = 1.0
max_attrition = 0.05
supply_limit = 2
ocean movement_cost = 1.0

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