This is not a complete list of terrain categories, but rather a sample

Desert = { color = { 238 232 170 } movement_cost = 2.0 combat_width = -0.10 units = { attack = -0.05 defense = 0.05 } enemy_army_bonus_air_superiority_factor = -0.1 supply_flow_penalty_factor = 0.15 truck_attrition_factor = 0.2 }

Mountains = { color = { 139 137 137 } movement_cost = 3.0 combat_width = -0.20 combat_speed = -0.20 units = { attack = 0.10 defense = 0.20 } enemy_army_bonus_air_superiority_factor = 0.1 supply_flow_penalty_factor = 0.25 truck_attrition_factor = 0.3 }

Urban = { color = { 128 128 128 } movement_cost = 1.5 combat_width = 0.10 units = { attack = 0.05 defense = -0.05 } enemy_army_bonus_air_superiority_factor = 0.1 supply_flow_penalty_factor = 0.10 truck_attrition_factor = 0.1 }

Hills = { color = { 139 126 102 } movement_cost = 2.5 combat_width = -0.10 units = { attack = 0.05 defense = 0.10 } enemy_army_bonus_air_superiority_factor = 0.05 supply_flow_penalty_factor = 0.12 truck_attrition_factor = 0.15 }

Swamp = { color = { 107 142 35 } movement_cost = 3.0 combat_width = -0.10 units = { attack = -0.05 defense = 0.05 } enemy_army_bonus_air_superiority_factor = -0.1 supply_flow_penalty_factor = 0.20 truck_attrition_factor = 0.25 }